HelpMaker is a Help Authoring Tool to make WinHelp, HTML-Help, HTML-Website and RTF (i.e., manuals) files. HelpMaker is fully functional GUI help authoring tool written in Delphi. Many open-source developers use this to document their open-source project
What can compete with hierarchical file structures and class/inheritance schemes if not networking organic type/form languages, with its own graphical and DOS compatible OS? This initiative always moves fast ahead, and in an enlightened way... GNU GPL
SImg is astronomical image processing software for Linux. Some of the features are deconvolution (various algorithms), removing interferences, automatic shifting of images, computation of PSF and and a visualization tool.
This is a demonstration program for electromagnetic waves using OpenGL to have 3D pictures and animations. It uses GTKpas as widget set to choose the demonstration and adjust values.