PlatformIO - Next-generation IDE for IoT
Visual Micro - Arduino IDE for Visual Studio and Atmel Studio
Arduino IDE - Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware...
Visuino - Visuino is a visual programming environment that lets you write programs from Arduino circuit boards.
ArduBlock - ArduBlock is a graphical programming language plugin specifically made for Arduino circuits and controllers.
Arduino Eclipse plugin - Where Arduino meets Eclipse