Slic3r - STL-to-GCODE translator for RepRap printers Here comes Slic3r! Its features are: - speed
MatterControl - MatterControl is a free, open source app that lets you organize and manage your 3D prints.
Simplify3D - Professional 3D printing software streamlines the process of 3D printing, leading to better results.
Repetier - Software for controlling RepRap style 3D-printer like Mendel, Darwin or Prusa mendel.
OctoPrint - OctoPrint is the snappy web interface for your 3D printer that allows you to control and monitor all aspects of your printer and print jobs, right from your browser.
Printrun - Printrun is a full suite of host interfaces for 3D printers and CNC.