The IDE for competitive programming
Phoenix is a modern open-source Code Editor for the web
A Rust compiler front-end for IDEs
Common Lisp editor/IDE with high expansibility
Open-source, cross platform Qt based IDE for reverse-engineering
Visual editor for open FPGA boards
RStudio is an integrated development environment (IDE) for R
A fast and lightweight 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
Vampirio Code, a great Code Editor and Compiler
Kile is a feature-rich LaTeX editor
Kisekae UltraKiss is a full featured integrated development environmen
AndroidIDE is an IDE for Android to develop full featured Android apps
Thinking notebook and Markdown editor
The developer platform for on-demand cloud development environments
Web IDE in single HTML file
Launch an external diff tool like WinMerge in Eclipse
Second Life script editor.
A data science IDE for Python