Win AVR

   WinAVR^TM (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++. WinAVR^TM contains all the tools for developing on the AVR. This includes avr-gcc (compiler), avrdude (programmer), avr-gdb (debugger), and more! WinAVR is used all over the world from hobbyists sitting in their damp basements, to schools, to commercial projects.  It is important to note that WinAVR is a collection of tools. For specific information on these tools see the links below:

• avr-libc - C library for AVR. Normal spot to report bugs that also affect GCC and Binutils first.
• avrdude - Programming software, supports lots of programmers.
• GNU Binutils - AVR target Binary Utilities (assembler, linker, etc)
• GNU GCC - C Compiler
• avrdude-gui - Graphical interface for avrdude
• GNU Debugger (GDB) - Command line debugger
• Insignt - Graphical debugger
• AVaRICE - Connects the JTAG ICE to the AVR-GDB debugging software.
• simulavr / simulavrxx - Simulator for the AVR
• MFile - Makefile editor
• Programmers Notepad - Text editor / IDE for compiler
• SRecord - Tools for editing EPROM load files.

                                                  Download the latest version from here


                              You can try WinAVR^TM out with Portable WinAVR^TM, a version that doesn't require an install. And when you get hooked on WinAVR^TM, you can put Portable WinAVR^TM on a USB key and take it everywhere with you! School, work, the library, the dentist, and more!
Portable WinAVR^TM is maintained at www.chip45.com/PortableWinAVR.