LiteIDE is a simple, open source, cross-platform Go IDE
A hackable text editor for the 21st Century
Arduino IDE library
Arduino and PlatformIO IDE compatible TFT library
Rapid applications development tool and libraries for FPC
Modernized fork of NEdit, with unicode support and AA text rendering
Daily macOS FPC + Lazarus snapshots (Cocoa - 64 bit - Intel and ARM64)
RAD Tool and IDE for PHP, JSP, ASP, C++ and Java Swing
ideU the ide. Universal.
Bluetooth LE Keyboard library for the ESP32
Eclipse plugin for VCS ClearCase
Open-source, cross platform Qt based IDE for reverse-engineering
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