A free C, C++ and Fortran IDE
Simple and flexible programming language for applications development
IDLE Extensions
PDF Library for Developers
A C Compiler/Editor for Retro 6809 Machines (Colour Computer/Dragon)
General-Purpose PDF Library for Java and .NET
FCKeditor (retired)
Graph algorithms interpreter, IDE, debugger, 3D visualizations.
XML Mill is a GUI based XML editor with a memory.
Extensible binary and text editor.
Library of linguistic tools
Trim Lines removes trailing whitespace from source code files