Arduino IDE library
RStudio is an integrated development environment (IDE) for R
A web based file manager, web IDE / browser based code editor
The agent IDE that builds itself
Jexer - Java Text User Interface Library
A free C, C++ and Fortran IDE
Modernized fork of NEdit, with unicode support and AA text rendering
NSBase is a database management system.
Thinking notebook and Markdown editor
Kisekae UltraKiss is a full featured integrated development environmen
an OSGi-based Swing Application Framework
uIDE (Micro IDE) is a free, open-source IDE for GPUtils
Cross-platform IDE for developing embedded solutions and desktops
A powerful editor and graphical debugger for code written in Scilab
RAD Tool and IDE for PHP, JSP, ASP, C++ and Java Swing
Kile is a feature-rich LaTeX editor
Symja - Java computer algebra language & symbolic math library
OpenLens Binary Build Repository
Web IDE in single HTML file
Lamdu, towards the next generation IDE
A syntax highlighting, code folding text component written in Swing
IDLE Extensions
Lightweight, cross-platform & full-featured shader IDE
EditBox is the Eclipse plugin for source code background highlighting.