1. MegacoreArduino hardware package for ATmega64, ATmega128, ATmega640, ATmega1280, ATmega1281, ATmega2560, ATmega2561, AT90CAN32, AT90CAN64 and AT90CAN128
2. SigmadspA versatile Arduino library for interfacing with the ADAU1701 audio DSP
3. MinicoreArduino hardware package for ATmega8, ATmega48, ATmega88, ATmega168, ATmega328 and ATmega328PB
4. MightycoreArduino hardware package for ATmega1284, ATmega644, ATmega324, ATmega324PB, ATmega164, ATmega32, ATmega16 and ATmega8535
5. MicrocoreAn optimized Arduino hardware package for ATtiny13
6. MegaCoreXAn Arduino hardware package for ATmega4809, ATmega4808, ATmega3209, ATmega3208, ATmega1609, ATmega1608, ATmega809 and ATmega808
8. MajorCoreAn Arduino hardware package for ATmega8515 and ATmega162
9. MCUdude corefilesSubtree for Arduino core files used with MightyCore, MegaCore, MiniCore and MajorCore