The abcMIDI suite consists of programs for turning ABC music files into MIDI and vice versa, typesetting them as PostScript files, and manipulate them in several ways. It provides a cross-platform GUI and bundles Tcl/Tk for Windows.
Tcl (Tool Command Language) is an interpreted scripting language optimized for portability and embedding. It's usually used in unison with its companion Tk GUI toolkit. All language operations are commands in prefix notation, and strings are used as most basic data construct, which both allow for variadic and dynamic uses. TclOO adds object-oriented semantics.
BallroomDJ is a ballroom music player. It is designed to let the computer choose the music and to be able to play music the entire evening without intervention. It features flexible playlists, music queue management, requests, seeking in songs, speed with pitch control, and an optional audio file organizer. Playlists can have automatic selections based on your choice of dances and how often those dances should play, stops after some number of songs has been played, stops at a particular time
Tke is a full-featured and Tcl/Tk-based source code editor. It supports syntax highlighting and auto-indentation for multiple languages. There's support for a Vim mode, code snippet and clipboard management, bookmarks and multiple cursors. Tke provides a tabbed interface with a file system sidebar. It's also NFS and lock aware, extensible per plugins, allows regex searching/replacing, has configurable menus, and allows unlimited undo/redo levels.
Scid vs. PC is a continuation of Shane's Chess Information Database, which provides a chess toolkit, move database, analysis tools, various chess AI engine bindings or to online servers. It remains database-compatible but adds many usability and feature enhancements, such as a tournament game mode, an overhauled GUI, new gamelists, rating graphs, other analysis engines, and drag and drop support on all platforms.
SaVi is software for simulation and visualization of satellite orbits, especially satellite constellations such as Iridium, Globalstar and O3b. It shows and animates movement and coverage over the Earth in two and three dimensions. SaVi can optionally use Geomview for 3D rendering.
TaskRegistry is an open tasks and time registation program. The time registration is designed to track the time spent on projects, f.e. to write monthly invoices to your customers. On tasks you can simply note your open tasks, arrange them in groups and prioritize them lower or higher.
For people who do not like classical spreadsheets, but need an office tool for tables: With Dagri you can build up tables and save data within. While a spreadsheet uses one single table layout, Dagri can use many tables with different layouts on one sheet. And it gives you more focus on your data. The intention is not another spreadsheet, but something new instead: a data grid application.
tkffmpeg is a simple GUI for controlling ffmpeg/avconv media file conversions. It's implemented as simple Tcl/Tk script. Generic audio and video encoding parameters can be set, such as DVD conversion options, and a progressbar is displayed.
[incr Tcl] is the most popular object-orientation language extensions for Tcl. Its object model is comparable to C++, includes multiple inheritance, classes and instances, and property and method visibility modifiers. It simplifies Tcl/Tk application building, both desktop apps or games; and generally structuring code flow, or chaining classes to C and C++ code. It also comes with new [incr Widgets] and [incr Tk] for building complex and custom widgets.
Savors can visualize multiple data streams from arbitrary input pipes. It synchronizes them in accordance to elapsed time, and arrange sources and their visualizations in any layout.
Ding is a user-friendly dictionary lookup program for the X window system. It comes with a German-English (AE and BE) dictionary with approximately 270,000 entries, references and explanations. It uses Tk version >= 8.3 and agrep or egrep for searching. It's very configurable, and can jump right into search mode when hovering above the main window with any current X11 text selection.