Slic3r - STL-to-GCODE translator for RepRap printers Here comes Slic3r! Its features are: - speed
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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.
Simplify3D - Professional 3D printing software streamlines the process of 3D printing, leading to better results.
IceSL - Welcome to IceSL!
Blender - Blender is the open source, cross platform suite of tools for 3D creation.