AVR Core Library (avr-corelib) is a free and open library to make it easier to program in C for Atmel AVR microcontrollers. The focus of this library is to simplify and abstract programming tasks common to many applications, such as communications and . AVR Core Library complements and builds off of AVR Libc at a higher level.
AVR Core Library is released under the BSD license, so you can use it in both open and proprietary code. If you would like to contribute to this project, please join the mailing list. AVR Core Library is currently housed under the AVR Libc project on Savannah.