Atmel
AVR offcial site. You find
here AVRStudio (simulator), IAR free assembler, application notes
and datasheets
AVR
ava + egcs C compiler A
powerful AVR assembler, RTOS with debugging capability all with
sources for Linux. Furthermore the porting of the egcs GNU C compiler
to the AVR architecture!
ICC
AVR A powerful C compiler for AVR
(it supports Tiny and 1200 too)