Calibre is an e-book library management application, viewer and editor. It's also commonly used for e-book file format conversion and syncing to reader devices. Calibre also simplifies downloading news from the web and converting them into e-book form, and can act as content server for online access to your book collection.
Python matplotlib is a for 2D plotting publication-ready figures in various formats, or rendering them interactively cross-platform. It can be scripted or used in Pythons interactive shell, within web applications, or through bindings with multiple GUI toolkits. It simplifies plot generation, histograms, power spectra, bar charts, error charts, scatter plots. Typical uses only require a few lines of code, while complex rendering is kept feasible. Its pyplot interface provides a MATLAB-style API.
Lutris is an open gaming platform and manager for Linux. It provides an unified interface for installation, configuration and foremost launching games. It works with native software, installed Windows and DOS games, Steam, Desura, online/browser games, as well as games from the over 20 supported emulators. Aquiring new games from any channel is helped by community-contributed installers. It comes prepacked for a few major distributions.
Newspipe is a web news aggregator and reader.
A full-featured web-based LDAPv3 client, which is agnostic to the actual LDAP tree structure. It does not require prior setup and configuration. It's intuitve schema browsing for references and dependencies makes it suitable for prototyping LDAP administration use-cases.
Pyspread is a desktop spreadsheet application. It's unique in supporting Python expressions in table cells rather than introducing a basic style language. It allows CSV import and export, while its own files are GPG signed. It can create charts using matplotlib, grid cells return pythonic objects, like macros can also be written in Python. It can therefore also utilize numpy or matrix operations.
CustomTkinter is canvas-based widget implementation atop Pythons Tk binding. It provides for simpler theming, and defaults to a modern rounded corner appearance.
Stegano is a pure Python Steganography module.
An extension for OpenOffice/LibreOffice to quickly apply machine translations to whole documents or text selections. Allows to utilize Google Translate, DeepL, MyMemory, Pons, Yandex, Microsoft Translate or other services right from within Office.
Where developers declaratively define and execute common operations on complex data structures. Operations are specified using a mini-language in which target structures are visually similar to their textual representation. The jertl mini-language unifies pattern matching, structure verification, template filling, transformation and production rule execution.
Animate-Yo and export_gif are Inkscape extensions to generate animated slides. Where export_gif assembles layers via ImageMagick or Pillow into GIF format, and interprets some SVG animate instructions. Which the companion tool can craft for documents.
A Python wrapper (using CFFI) around Linux's renameat2 system call. With renameat2, you can atomically swap two files, choose if existing files are replaced, and create "whiteout" files for overlay filesystems.
This module provides Python bindings for the Starlark programming language. It allows evaluating Starlark code from Python, and setting and retrieving values from the Starlark execution context.
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BashStyle-NG is a graphical tool and toolchain for changing the behaviour and look'n'feel of Bash, Readline, Vim, Nano and Git. Possibilities include Bash: 12 fancy pre-defined prompt styles, colors are customizable, random text color, random prompt style for each session possible, create your own prompt using UI, colored manpages (without using most), rembering last visited directory (and restore upon new session), customize bash history settings, lscd: customized variant of cd, showing conte
Backend script for ding (dictionary lookup GUI) to search for synonyms. Doesn't use local dictionaries, but queires online services like Merriam-Webster, Thesaurus, Reverso, OpenThesaurus, Urban Dict, and dict.cc (for translations).
Godot Engine is a feature-packed, cross-platform game engine to create 2D and 3D games from a unified interface. It provides a comprehensive set of common tools, so that users can focus on making games without having to reinvent the wheel. Games can be exported in one click to a number of platforms, including the major desktop platforms (Linux, Mac OSX, Windows) as well as mobile (Android, iOS) and web-based (HTML5) platforms. Godot is completely free and open source under the very permissive M
Nikola generates static websites and blogs, with feeds, comments, media galleries and an archive. Content can be authored in reStructuredText, Markdown/CommonMark, Wiki, BBCode, Textile, AsciiDoc, Python Notebooks, Misaka, Pandoc, txt2tags, orgmode, or plain HTML. It also provides code sections with syntax highlighting, is multi-lingual, fully themeable, and can utilize external tools. It's foremost rather fast and its static pages don't have further webserver requirements.
Roundup is a simple-to-use and install issue-tracking system with web, command-line xmlrpc, rest (in the 2.0 development line) and e-mail interfaces. It is based on the winning design from Ka-Ping Yee in the Software Carpentry Track design competition. Downloading the source allows you to start a demo instance in a few minutes to see if it will fill your needs. Unpack the tarball and run: python demo.py
Tornado is a Python web framework and asynchronous networking library. By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling, WebSockets, and other applications that require a long-lived connection to each user. It's comprised of a web framework, a HTTP client and server implementation based on an asynchronous networking core, and it coroutine library. As whole it can supplant WSGI setups, but the web framework itself may
DataMelt is a program for numeric computation, mathematics, statistics, symbolic calculations, data analysis and data visualization. It supports several scripting languages, such as Python, Ruby, Groovy (and others), with the power of hundreds of Java packages. Available for Windows, Linux and Mac OS.
FreeCAD is a general purpose parametric 3D CAD modeler based on the OpenCASCADE geometry kernel. It's written in Python and its GUI utilizes Qt. It provides a modular plugin architecture and extensibility via macros and scripts, but already comes with a wide range of 2D and 3D property editing tools and transformation filters, simulation and rendering backends. Various export formats include STEP, IGES, OBJ, STL, DXF, SVG, STL, DAE, IFC or OFF, NASTRAN, VRML, DWG, and the native FCSTD files.
KvFront is a GTK+ 3.0 based Redis GUI and Memcached GUI .It is totally free and open source. KvFront features an easy-to -use and straightforward graphical user interface, allowing users to easily work with Redis and Memcached in Linux based GTK+ 3.0 desktop environment.It can work on Linux and Windows64.
This library lets you edit the entries on the right click menu for Windows and Linux using pure Python. It also allows you to make cascading context menus! context_menu was created as due to the lack of an intuitive and easy to use cross-platform context menu library. The library allows you to create your own context menu entries and control their behavior seamlessly in native Python. The library has the following features: - Written in pure python with no other dependencies - Extremely intuit
Freshermeat is an open source software directory and release tracker. Main functionalities are the following: - tracking of software releases, vulnerabilities (CVE) and news; - subscribe to releases of a project or an organization via an ATOM feed; - JSON-based API in order to manages projects, releases, CVEs, etc.; - management of organizations.
The Visualization Toolkit (VTK) is open source software for manipulating and displaying scientific data. It comes with state-of-the-art tools for 3D rendering, a suite of widgets for 3D interaction, and extensive 2D plotting capability. VTK is part of Kitware’s collection of supported platforms for software development. The platform is used worldwide in commercial applications, as well as in research and development.
A Simple lightweight browser written in python With the PyQt5 python library
JARR (Just Another RSS Reader) is a web-based news aggregator and reader.
Streamtuner2 is an internet radio browser. It utilizes various directory services like Shoutcast, Xiph, InternetRadio, SurfMusik, Streema, TuneIn, LiveRadio, Reddit, or Jamendo and Peertube to present categorized streaming stations. It chains to installed audio players like Audacious or VLC, uses streamripper for recording, but also allows bookmarking, exporting and easy searching.
Julia is a high-level, dynamic, and JIT-compiled programming language for technical computing. It integrates distributed multiple-dispatch parallel execution, a mathemetical function library, numerical accuraccy, libraries for linear algebra, signal processing, Unicode-aware string processing, Lisp-like macros, Python code bondings, C function wrapping, user-defined and dynamic typing.
Arronax is a program to create and modify starters (technically: .desktop files) for applications and locations (URLs). Arronax can be used as a standalone application or as a plugin for the file managers Caja, Nautilus, Nemo and Thunar. Arronax is written in Python and uses GTK for the graphical user interface.
The quick and easy way to add versatile graphical interfaces with networking capabilities to your Python programs. Give instant access to your application to whoever you want on the Internet, without having to deploy it. Works even on your Android smartphone or tablet.
"dl" is a simple file sharing service for quick/one-off file transfers. Upload a file to get a link you can share. Or create a sharing link to receive files from others. The uploaded files are automatically removed when left unused, requiring zero additional maintenance. "dl" is built for your users: easy to use with any browser, integrates smoothly with Thunderbird for large attachments, works on Android, Windows and OSX or straight from the command line for maximum convenience.
Bokeh is an interactive visualization library for modern web browsers. It provides elegant, concise construction of versatile graphics, and affords high-performance interactivity over large or streaming datasets. Bokeh can help anyone who would like to quickly and easily make interactive plots, dashboards, and data applications.
Pelican is a static site generator, written in Python. Write content in reStructuredText or Markdown using your editor of choice Includes a simple command line tool to (re)generate site files Easy to interface with version control systems and web hooks Completely static output is simple to host anywhere Features Pelican currently supports: Chronological content (e.g., articles, blog posts) as well as static pages Integration with external services (e.g., Google Analytics and Disqus) Site theme
Natron is a visual effects composition software. It supports many common image file formats (EXR, DPX, TIFF, JPEG, PNG); colorspace management via OpenColorIO, and visual effects via OpenFX / OFX plugins. It has low hardware requirements that allow real-time playback, comes with command line tools, and uses Python3 for scripting.
Relax with a classic word search game that you can play in your terminal. Supports 80 column displays and a selection of over 50 word searches out of the box. It also features user generated puzzles and runs in Python 3 on almost every OS!
pybind11 is a lightweight header-only library that exposes C++ types in Python and vice versa, mainly to create Python bindings of existing C++ code. Its goals and syntax are similar to the excellent Boost.Python library by David Abrahams: to minimize boilerplate code in traditional extension modules by inferring type information using compile-time introspection.
A python library to write a table in various formats: CSV, HTML, JavaScript, JSON, LTSV, Markdown, MediaWiki, Excel, Pandas, Python, reStructuredText, SQLite, TOML, TSV. Also supports: - Automatic tabular data formatting - Alignment - Padding - Decimal places of numbers - Multibyte character support - Write table to a stream such as a file/standard-output/string-buffer
video2midi is an open source crossplatfrom utility, written in python for creating midi file from Synthesia video and the like.. Works on GNU/Linux, *BSD, Windows & Mac
Spyder is a powerful scientific environment written in Python, for Python, and designed by and for scientists, engineers and data analysts. It offers a unique combination of the advanced editing, analysis, debugging, and profiling functionality of a comprehensive development tool with the data exploration, interactive execution, deep inspection, and beautiful visualization capabilities of a scientific package. Beyond its many built-in features, its abilities can be extended even further via its
OpenShot Video Editor is a free, open-source video editor for Linux. OpenShot can take your videos, photos, and music files and help you create the film you have always dreamed of. Easily add sub-titles, transitions, and effects, and then export your film to DVD, YouTube, Vimeo, Xbox 360, and many other common formats.
sqlite_bro is a simple graphical and tabular SQlite database browser in a single Python script. It comes with administrative functions such as import/export of CSV and SQL data, and provides SQL-embedded Python functions.
Winpython is a portable Python Distribution for the Windows-platform, allowing you to run your code using Numpy, Scipy, Matplotlib, Pandas, Numba, Cython and many other great software of the scientific stack of Python.
youtube-dl is a small command-line tool to download videos. While it originally and still is used for YouTube.com, it supports many other video hosters like Anitube, Appletrailers, Archive.org, ARD, Arte, Blinkx, Bloomberg, CBS, clipfish, CollegeHumor, ComedyCentral, Discovery, dropbox, eHow, flickr, FranceTV, Google+, GorillaVid, Internet Video Archive, justintv, KhanAcademy, liveleak, MTV, MyVideo, NBC, Newstube, novamov Slideshare, SoundCloud, Southpark, Steam, SyFy, Veoh and Vimeo. It can sa
GDAL is a translator library for raster and vector geospatial data formats that is released under an X/MIT style Open Source License by the Open Source Geospatial Foundation. As a library, it presents a single raster abstract data model and single vector abstract data model to the calling application for all supported formats. It also comes with a variety of useful command line utilities for data translation and processing.
Duplicity is a bandwidth-efficient backup system with built-in encryption. It produces incremental tar volumes and stores them onto local or remote servers using librsync. It utilizes GnuPG for encryption and signing.
A Python Wrapper to access the Overpass API (the read-only OSM3S interface to open street map data, which can be queried over the web simply by location, types, proximity or tags).
Cookiedough is a GUI frontend for cookiecutter. It allows browsing existing templates by category, inspecting README, template structures, and searching for contents. It obviously also allows installing them; with more convenient GUI input. Comes with a database of around 2300 templates.
Meld is a visual diff and merge tool targeted at developers. Meld helps you compare files, directories, and version controlled projects. It provides two- and three-way comparison of both files and directories, and has support for many popular version control systems. Meld helps you review code changes and understand patches. It might even help you to figure out what is going on in that merge you keep avoiding. Features Two- and three-way comparison of files and directories File comparisons u
Quoting their home page: MicroPython is a lean and efficient implementation of the Python 3 programming language that includes a small subset of the Python standard library and is optimised to run on microcontrollers and in constrained environments.
Inverted pendulum simulation with adjustable PID paramters.
rduty is a Python script to easily and quickly run a command or multiple commands on remote and local hosts and devices via ssh (telnet is also supported). It is also able to automate repetitive tasks on many hosts using inventory files from Ansible, or simple .ini inventory files. rduty is currently tested on Python3, it hasn't been tested yet on other Python versions.
modseccfg is a simple GUI to tame mod_security rules. It scans logs for possible false positives, and simplifies disabling rules. It works locally or per sshfs-remoting on server config files. Provides a configuration editor, some rule recipes, and basic log listing.
Graphical counterpart to tabview, a simple tabular data viewer that can be used both stand-alone and as a Python module for various files and Python/Pandas/NumPy data structures.
Xcoral is a multiwindow mouse-based text editor for Unix and X Window System. Syntax highlighting and auto-indentation are available. A built-in browser enables you to navigate through C functions, C++ and Java classes, methods and files. A SMall Ansi C Interpreter (Smac) is also built-in to dynamically extend the editor's possibilities (user functions, key bindings, modes etc). Xcoral provides regions and marks, kill-buffers, macros system and unlimited undo.
FrePPLe is a product planing and scheduling toolkit. It models planning processes targeted at discrete manufacturing industries constrained by material, capacity and lead time. Integrates data maintenance capabilities, Excel import, a web-based user interface. And it's extensible with custom data models or algorithmic solvers.
Glaxnimate is a vector graphics animation program which focuses on being quick and easy to use. It's designed to work well with short animations to show on the web, supporting several common web formats like GIF, WebP, Lottie, SVG, and others.
Paperwork is a GUI to make papers easily searchable using OCR. The basic idea behind Paperwork is "scan & forget" : You should be able to just scan a new document and forget about it until the day you need it again.
Flowblade is a multitrack non-linear video editor for Linux released under GPL 3 license. Flowblade is designed to provide a fast, precise and robust editing experience. Flowblade employs a film-style insert editing model as workflow. In insert editing clips are generally placed tightly after other clips when they are inserted on the timeline. Edits are fine tuned by trimming in and out points of clips or by cutting and deleting parts of clips. Flowblade provides powerful tools to mix and filt
Pitivi is a unique video editor suited for newcomers and professionals. It features hundreds of animated effects / filters / transitions, any GStreamer-supported video file and encoding format, realtime editing, is framerate-independent and very precise, audio processing and volume normalization, Gnome and GES-integration, and allows reliable background processing and has built-in backup functionality.
Django is a high-level Python Web-MVC framework for RAD with clean and pragmatic code. It's comparatively fast, integrates moderns security features, and is very scalable. It prefers explicit configuration over implicit conventions, has an object-relational database mapper, autogenerated admin interfaces, flexible regex-based URL dispatching, internationalization features, a custom templating engine or Jinja2, caching, authentication or authorization, a user comment plugin, RSS/Atom and sitemap
Alembic is an open computer graphics interchange framework. Alembic distills complex, animated scenes into a non-procedural, application-independent set of baked geometric results. This 'distillation' of scenes into baked geometry is exactly analogous to the distillation of lighting and rendering scenes into rendered image data. Alembic is focused on efficiently storing the computed results of complex procedural geometric constructions. It is very specifically NOT concerned with storing the comp
A light weight, zero dependency (only standard libs used), to the point (no bells and whistles) Microsoft Excel reader/writer python 2.7.18 - 3+ library. Zero non-standard library dependencies No compatibility/version control issues. Light-weight single source code file that supports both Python3 and Python2.7.18. Single source file that can easily be copied directly into a project for true zero-dependency. Great for those that have installation/download restrictions. In addition the library's
Originally based on 'flyback', dupli.back, is a full featured backup GUI frontend application built on top of the duplicity command line backup tool.
A screencast tool to display your keys, inspired by Screenflick. This major rewrite features: Several keyboard translation methods, Key composition/input method support, Configurable font/size/position, Highlighting of recent keystrokes, Improved backspace processing, Normal/Emacs/Mac caps modes, Multi-monitor support, Dynamic recording control by pressing both control keys, Switch for visible shift and modifier sequences only.
Set up a small-scale kafka cluster on local kubernetes - perfect for functionality testing and local development. minikan stands for "mini" kafka-kubernetes (kan) and is a part of the kafkanetes project. Under small-scale kubernetes cluster - we mean "something" that can run on your local laptop using such products as Docker Desktop or minikube.
Injectable is an elegant and simple Dependency Injection Python framework built with Heart and designed for Humans.
GluCat is a generic library of C++ templates that implement universal Clifford algebras over the field of real numbers. The PyClical extension module for Python gives users an easy Python scripting interface for calculations in Clifford algebras. The name PyClical is an homage to Pertti Lounesto's CLICAL.
This program allows you to view BPG Images in Windows, Linux and macOS. Features: * Large images are autoscaled to fit screen area * Basic support for animated images (zooming, rotating and exporting for animated images are not supported) * Zoom In/Out * Full screen mode * Support mouse dragging of the zoomed image * Cyclic view of all images in the same directory * Saving a copy of the opened file as a PNG file * Saving a copy of the opened file * Deleting the opened files * Rotating the view (
A cross platform backup utility that reads an input file of what to include and then pack the files in a zip file and saves it to a specified location. Because of its dynamic way of handeling arguments you can run it from crontab, Windows scheduler, scripts or manually. You can also setup different jobs on the same machine, separating them with unique job names and locations.
Privacy Indicator is a notification area applet (application indicator) for the top panel of Ubuntu’s Unity desktop environment. The goal of Privacy Indicator is to make it easy to change settings that influence the user’s privacy or the automatic collection of data and to delete automatically collected data.
Tardis is a backup system similar to TimeMachine which allows encrypted and incremental backups, with filesystem-based recovery. It's based on a client and server architecture, and provides a FUSE driver and VCS-like revision archive access.
Timeline displays a navigatable timeline. It provides zooming in on events, varies the presentation accordingly, can jump to a specific data, search event text notes, organize them in a tree instead. Events can be added per wizard or dragged and resized visually.
deb-pkg-tools is a Python module for managing Debian packages. It provides for inspecting, building, checking and signing packages, or managing repositories. deb-pkg-tools thereby bases its API on manual meta data parsing or wrapping calls to native tools, such as dpkg, dpkg-deb, lintian, apt-get, apt-ftparchiv, gzip, fakeroot, gpg, dpkg-scanpackages.
Blender is a free and open source 3D animation suite. It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, even video editing and game creation. Advanced users employ Blender’s API for Python scripting to customize the application and write specialized tools.
MakeHuman is developed using 3D morphing technology. Starting from a standard (unique) androgynous human base mesh, it can be transformed into a great variety of characters (male and female), mixing them with linear interpolation. For example, given the four main morphing targets (baby, teen, young, old), it is possible to obtain all the intermediate shapes. Interpolation of MakeHuman characters: the 1st, 3rd, 5th, and 7th are targets, while the others are intermediate shapes. Using this techn
Druwez is a GTK based graphical printing tool written in Python. With Druwez you can use drag & drop or the clipboard to print multiple files at once from the file manager without opening any dedicated applications. You can optionally save print jobs to print them later (again). Only the file names but not the file content are saved in that case so you don’t need much disk space. Druwez itself can handle PDF, PNG, JPEG and SVG files. To print other file formats you can define converters. A co
GUI for the most used ImageMagick functionality for processing pictures: - scaling/resize, - crop, - text annotation, inside or outside of picture (mems generator), - border around picture, - rotation, - black-white or sepia, - contrast increase/decrease or normalize or histogram stretching, - color auto-level or equalize, - adding logo image o picture, - file formats: JPG, PNG, TIFF, SVG - format conversion into JPG, PNG, TIFF.
gcode2photon is an open source crossplatfrom utility, written in python for creating images from GCODE to use in PhotonFileEditor and print it. For example: use Cura and print model with 5% infill.
Crack is an imperative, object-oriented programming language deriving concepts from Java, C++ and Python.
gREST (Graph-based REST API Framework) is a RESTful API development framework on top of Python, Flask, Neo4j and Neomodel. Its primary purpose is to ease development of RESTful APIs with little effort and miminum amount of code.
View a CSV file and Python data structures in a curses, spreadsheet-like display.
A suite of lightweight and composable tools for software development including: * git/mercurial repository hosting * bug/ticket tracker * continuous integration * mailing lists * task dispatching and service integration * markdown and git driven wikis * account management and security
Gnome-manual-duplex is a utility that adds manual duplex to the "Print" menu. It is a virtual CUPS printer, but also works as standalone utility. It can handle both PostScript and PDF documents.
BitWrk is a peer-to-peer computation service that tightly integrates into Blender, the 3D rendering software. BitWrk greatly accelerates rendering by scaling to a swarm of computers. Fueled by Bitcoin, BitWrk creates an open marketplace where participants buy or sell computing power like stocks in a stock exchange.
Pysolar is a collection of Python libraries for simulating the irradiation of any point on earth by the sun. It includes code for extremely precise ephemeris calculations, and more.
A 3D CAM-library written in c++ with python bindings. The main functionality it provides is axial and radial cutter-projection algorithms against polyhedral (triangulated) surfaces.
This is a straightforward Python wrapper for ssdeep by Jesse Kornblum, which is a library for computing context triggered piecewise hashes (CTPH). Also called fuzzy hashes, CTPH can match inputs that have homologies. Such inputs have sequences of identical bytes in the same order, although bytes in between these sequences may be different in both content and length.
email2trac is a utility that converts email messages to Trac tickets. It features HTML message conversion, attachments, updating of tickets via email, command line options, a configuration file, Unicode support, spam detection, workflow support, and support for FullBlogPlugin and DiscussionPlugin.
sK1 is an open source multiplatform vector graphics editor similar to CorelDRAW, Adobe Illustrator, or Freehand. The major feature of sK1 is a professional precise printing and "prepress ready" PDF & PostScript output.
LiVES is a video editing system, which provides realtime editing and mixing, can apply realtime rendering effects, or just perform format conversions. It's suitable both for newcomers and VJs, available cross-platform, runs even on low-end hardware, and is extensible per RFX plugins.
File Service Protocol is a lightweight UDP-based file transfer system. It has many benefits over plain FTP, such as anonymity for transfers and archives. It's less bandwidth intensive but still fault tolerant.
Scribus is a professional typesetting and page layout program, available on all major platforms but also for OS/2 and GNU/Hurd. It provides press-ready PDF output, but a user-friendly and modern interface. It supports color separation, ICC profiles, CMYK and spot colors.
Slpkg is a powerful software package manager that installs, updates, and removes packages on Slackware based systems. It automatically computes dependencies and figures out what things should occur to install packages. Slpkg makes it easier to maintain groups of machines without having to manually update. Slpkg works in accordance with the standards of the organization slackbuilds.org to builds packages. Also uses the Slackware Linux instructions for installation, upgrading or removing packages.
Fookebox is a jukebox-style web-frontend to MPD. It offers the following features: * Browse your music library by artist or genre * Add songs to the play list (obviously) * Limit the queue size * Add whole albums to the play list * Remove songs from the play list * Search for artists/albums/titles/files * Control MPD
Picard is a cross-platform music tagger written in Python. It supports all common audio formats (MP3, FLAC, OGG, M4A, WMA). And uses AcoustID audio fingerprints, for automatic music identification; or look up CD images even. For additional features, a wide list of plugins is available; and it's easy to extend.
Mercurial is a free, distributed source control management tool. It's lightweight and efficiently handles projects of any size with an easy and intuitive interface.
Python based milter for Sendmail and Postfix MTA servers to check incoming e-mails for Microsoft Office attachments. If a Microsoft Office document is attached to the e-mail, it will be scanned for suspicious VBA macro code. Files with malicious macros are, depending on configuration, either removed and replaced by harmless text files or alternatively the whole e-mail will be rejected.
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