Use WinAVR if you are on Windows, use AVR-GCC if you are on Linux. Edit the sources in whatever editor you want (I prefer a notepad with code highlighter) and then type "make" for build. I will add the project files for Arduino sketch soon. Use any AVR ISP programmer to load the program into the AVR. Dont forget to set the fuses for HF external oscillator and to disable the "CKDIV" option.
Download source code of all projects: retrowiz-src.zip