A library for manipulating 3D meshes as set operations on convex objects
Layermesh allows you build complicated non-convex 3D meshes by combining convex objects, and export the resultant mesh as an STL or TIFF file for 3D printing.
Layermesh is currently in development. It is written in C++, and built on CGAL, the [http://www.cgal.org/](Computational Geometry Algorithms Library,) specifically on its [http://doc.cgal.org/latest/Manual/packages.html#PkgTriangulation3Summary](Triangulation 3D) module, which is licensed under GPLv3 (and therefore so is this project.)