Software for controlling RepRap style 3D-printer like Mendel, Darwin or Prusa mendel. Works with most firmware types. It is optimized to work with Repetier-Firmware Other working firmware is Sprinter, Teacup, Marlin and all compatible firmwares. It does not contain a slicer directly, rather it uses either Slic3r or Skeinforge.
... and there is an alternative to it called Repetier Server which let´s you control your 3D-printer remotely