Graph algorithms interpreter, IDE, debugger, 3D visualizations.
Simple HTML Editor
Cloud-based Integrated Development Enviroment
JetBrains Meta programming System
Eclipse integration for Isabelle proof assistant
An Eclipse plug-in for the IBM FileNet P8 Content Engine and CMIS
Lua Editor
KnowWE has moved, please see http://d3web.sourceforge.net
Developer's friendly IDE
The Scratch mod, Tiger
the disruptive IDE for COBOL developers