AtmanAVR.
Helpful Links
Since AtmanAVR is IDE using GCC compiler, it is not a compiler itself. The background tools
and some of sample routines came from the following websites. You can visit them for more information.
AVR Libc (http://www.nongnu.org/avr-libc/)
AVRFreaks (http://www.avrfreaks.net/)
GCC and other GNU software (http://gcc.gnu.org/)
Joerg Wunsch (http://www.sax.de/~joerg/)
WinAVR (http://sourceforge.net/projects/winavr/)