MeshUp is a 3D modelling mashup tool to make 3D printing easier.
The software allows you to combine and manipulate different objects to create a single 3D model, make one or two-sided shell structures -- so it is possible to convert any mesh into volume, even if it is not part of a solid object.
In addition, MeshUp features mesh repair and the creation of "watertight" STL files. In the future, the developers want to be able to add different material options for a 3D-printable mesh.
The project's Kickstarter campaign managed to secure $27,206 based on a $25,000 goal.