GIMP Massive Package for Windows and Mac, tons of plugins and extras.
Gimp WebP Plugin provides Gimp with the ability to load and export WebP images.
Photivo is a powerful and feature-rich photo processor.
It can trace and log API and ActiveX interface with parameters.
Johnathan Morlock,Robert Nordan,Pinta Community
Open source program for drawing and image editing.
Those are Win32 (pywin32) extensions source code for Python.
VisualHG indicates file status within the project files tree of MSVC.
The Octopod Group
Octopod for C++ 3.1 is visual multi-compiler IDE for building C++ programs. It supports MSVC, BORLAN....
GTK+, or the GIMP Toolkit, is a multi-platform toolkit.
Handy and free tool to help you manage several GIMP windows.
A software that combines OpenOffice.org, GIMP, VirtualDub, Audacity and Mozilla.
G'MIC has been made available as an easy-to-use plug-in for GIMP.
Add beautiful blue skies to any picture with GIMP Add-on - Blue Sky.
Brush Manager is a free and easy to install plug-in for GIMP.
A set of components designed for GIMP interface replacing in Windows.
GIMP Extensions is a handy plugin set which can improve your graphic design.