TclTk-IDE for development and testing tcltk-apps
A powerful editor and graphical debugger for code written in Scilab
Vampirio Code, a great Code Editor and Compiler
AndroidIDE is an IDE for Android to develop full featured Android apps
RAD Tool and IDE for PHP, JSP, ASP, C++ and Java Swing
Kile is a feature-rich LaTeX editor
Thinking notebook and Markdown editor
Symja - Java computer algebra language & symbolic math library
The developer platform for on-demand cloud development environments
Launch.nvim is modular starter for Neovim
Web IDE in single HTML file
TurkDevOps Açık Kaynak Operasyonları
Lamdu, towards the next generation IDE
Static site IDE is a Static Site Generators aka Static Site Editor
Use NeoVim as general purpose IDE
Open Source C & C++ IDE for Windows
Launch an external diff tool like WinMerge in Eclipse
A customized distribution of Code::Blocks IDE for Fortran language
A simple Bash IDE / Debugger
CodeLite: an open source, cross platform C/C++/PHP and JavaScript IDE