WinAVR
Used by 1 personwinavr.sourceforge.net ↗

“WinAVR is a complete package for programming AVR microcontrollers -- just double-click it, it installs, and works!”
Mitch Altman Interview, Inventor · via Uses This
“WinAVR is a complete package for programming AVR microcontrollers -- just double-click it, it installs, and works!”