TextMate is a text editor for MacOS X which binds common Unix tools and features and is useful as programming editor. It provides project sessions, regex search and replace, auto indentation, bracket pairing, a clipboard history, column selections, word completion, CSS-style selections, language grammars and syntax highlighting (50 langs), document outlines, shortcut words, code folding, visual file bookmarks. It's also plugin-extendable, allows macro recording, shell command invocation, SCM int
Eric is an IDE for Python and Ruby. Version 5 is based on Python2, Qt4 and Scintilla. It provides unlimited editor windows and layout, syntax checking and highlighting, autocompletion, calltips, folding, brace matching, spell checking, search and replace. It includes a class browser, various VCS interfaces, collaboration features, documentation helpers, and a remote debugger for Python and Ruby, unit testing, profiling and code coverage stats, and an interactive Python shell. Command-line filter
KKEdit is a programmers editor using the Gtk toolkit in the style of Mac BBEdit. It's not an IDE, but provides slightly more coding functionality than other text editors; syntax highlighting, function outlines/jumping, external tool and binding and an inline-shell, remote editing, manual viewing, and remembers editing sessions. KKEdit uses non-flat tabs and icons per default.
Leo is a programmers editor, suitable as IDE, and also provides PIM funtionality. It provides unqiue outlines which are represented in a tree, with view nodes being able to occur multiple times. It's fully scriptable in Python itself, where extensions can access outline data and Leos code directly, export to external files containing outline markup.
Decompiler reads EXE, DLL and ELF program binaries, disassembles them, tries to infer data types, and produce structured C source code from it. It fully supports x86 and m68k machine code and partially PowerPC, ARM; but is designed processor type and binary format agnostic. It can take project-specific meta information into produce more readable source code.
Cmajor is an experimental programming language. It mixes concepts and language semantics from C++ and C# for semantics. It runs on a virtual machine (cmx) after compilation (cmc), and comes with a debugger (cmxdump). It's itself implemented in C++98 using soul2cpp, provides 64bit integer types using boost, comes with filesystem, shared pointers and threading interfaces. It's cross-platform and comes with an extensive manual.
DUB is a source file dependency resolver and package manager for the D programming language. It utilizes a simple JSON package description scheme, integrates with git for implicit release versioning, generates VisualD project files for MonoD, comes with support for DMD, GDC and LDC; and can utilize local directories as package source.