Arduino IDE library
Open-source, cross platform Qt based IDE for reverse-engineering
Rapid applications development tool and libraries for FPC
Modernized fork of NEdit, with unicode support and AA text rendering
Arduino and PlatformIO IDE compatible TFT library
ideU the ide. Universal.
uIDE (Micro IDE) is a free, open-source IDE for GPUtils
TclTk-IDE for development and testing tcltk-apps
RAD Tool and IDE for PHP, JSP, ASP, C++ and Java Swing
A hackable text editor for the 21st Century
Bluetooth LE Keyboard library for the ESP32
Eclipse plugin for VCS ClearCase
BASIC language interpreter (multiplatform)
Vim-like editing in Eclipse
An extensive IDE for exploring GraphQL API's
Electronic design and programming tools suite like Eagle, MpLab
A Simple 'IDE'A for Linux Kernel Developers
Open source cloud & desktop IDE
PHP Support for GNU Emacs