Open-source, cross platform Qt based IDE for reverse-engineering
IntelliJ IDEA & IntelliJ Platform
A fast and lightweight IDE
The scientific Python development environment
Simple crossplatform IDE for NASM, MASM, GAS and FASM languages
VSCode theme based off the easemate IDE and Jetbrains islands theme
AstroNvim is an aesthetic and feature-rich neovim config
A powerful, lighweight and cross-platform C/C++ IDE
Vampirio Code, a great Code Editor and Compiler
Customizable multiplatform development environment.
TclTk-IDE for development and testing tcltk-apps
Learn Java the easy way!
Cross-platform IDE for developing embedded solutions and desktops
uIDE (Micro IDE) is a free, open-source IDE for GPUtils
RAD Tool and IDE for PHP, JSP, ASP, C++ and Java Swing
Komodo Edit is a fast and free multi-language code editor
A hackable text editor for the 21st Century
Web IDE in single HTML file
Lamdu, towards the next generation IDE
A syntax highlighting, code folding text component written in Swing
IDLE Extensions
A terminal package for Atom, complete with themes, API and more
EditBox is the Eclipse plugin for source code background highlighting.