Slic3r – Open-source and cross-platform 3D printing toolbox

Slic3r is a lightweight, free and open-source 3D printing & slicing software developed by Alessandro Ranellucci from Italy (written in C++). Its comes with powerful functions, yet is convenient and simple to use. As one of the most professional and one of the few 3D printing programs, Slic3r's slicing speed is 100 times faster than the early Skeinforge, so it can definitely meet your high-tech 3D slicing needs.