WinAVR

WinAVR (pronounced “whenever”) is a suite of executable, open source software development tools for the Atmel AVR series of RISC microprocessors hosted on the Windows platform. It includes the GNU GCC compiler for C and C++.
Check out the WinAVR project on Sourceforge at http://sourceforge.net/projects/winavr/ for developer information. Use the navigation menu on the left [...]