Komodo Edit is a fast and free multi-language code editor
A hackable text editor for the 21st Century
It is an LL(1) recursive descent parser generator in VB.NET
Web IDE in single HTML file
Cross platform SDK
Lamdu, towards the next generation IDE
A syntax highlighting, code folding text component written in Swing
IDLE Extensions
Use NeoVim as general purpose IDE
Lightweight, cross-platform & full-featured shader IDE
Launch an external diff tool like WinMerge in Eclipse
All-in-one web-based IDE specialized for machine learning
A terminal package for Atom, complete with themes, API and more
EditBox is the Eclipse plugin for source code background highlighting.
A Golang plugin collection for SublimeText 3
The engine for haskell ide-integration. Not an IDE
Simple, free and open-source online code editor
A modern, lightweight yet powerful text editor
Source code for the processing core and development environment
Qt Creator Google C++ Testing Framework integration plugin
An IDE for Clojure