dob71's Stars
MarlinFirmware/Marlin
Marlin is an optimized firmware for RepRap 3D printers based on the Arduino platform. Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine.
ahmetcemturan/SFACT
SFACT the New Skeinforge
kliment/Printrun
Pronterface, Pronsole, and Printcore - Pure Python 3d printing host software
kliment/Sprinter
Firmware for RepRap printers and similar devices
Traumflug/Teacup_Firmware
Firmware for RepRap and other 3D printers