Phoenix is a modern open-source Code Editor for the web
Apache NetBeans
Kotlin code completion, diagnostics and more for any editor/IDE
A web based file manager, web IDE / browser based code editor
Learn Java the easy way!
A powerful editor and graphical debugger for code written in Scilab
A hackable text editor for the 21st Century
Web IDE in single HTML file
IDLE Extensions
Open Source C & C++ IDE for Windows
Launch an external diff tool like WinMerge in Eclipse
A modern, lightweight yet powerful text editor
The professional, open source development tool for the open web
Electronic design and programming tools suite like Eagle, MpLab
Develop AMX NetLinx projects in the Sublime Text editor.
Develop Crestron Simpl+ modules in Sublime Text.
Graph algorithms interpreter, IDE, debugger, 3D visualizations.