ESP8266 framework for Homie, a lightweight MQTT convention
AVR simulator IDE
MIDI for Arduino
MySensors library and examples
An open source ecosystem for IoT development
EtherCard is an IPv4 driver for the ENC28J60 chip
LEDseq is Arduino library for advanced state indication with LED(s).
BT configuration by AT commands for Arduino (lib)
Real-Time Processing Library for OSHW Biomedical Sensors
Configuration finder by AT commands with auto-configure options
Vanyamba Electronics library of C++ Classes for AVR.
DMX Library and usage examples for Arduino
Electronic design and programming tools suite like Eagle, MpLab
Librería para generación de señales de VGA con Arduino estándar
arduino bari3 (IDE) for programming arduino with arabic language
Library for Arduino based R/C equipment
Another Real Time Kernel for Arduino
A library for the control of ShiftBrite modules
A library for the control of motors using the TI DRV8833 IC
Toolkit for the easy prototyping of hybrid games for Tabletop Devices
An automatic, configuration-less, GUI for Arduino projects.
The serial LCD module using ATmega8 along with easy arduino library.
Lego Arduino Drivers