Qt based GUI for mesh viewing/manipulation
http://sourceforge.net/apps/mediawiki/meshlab/index.php?title=Main_Page
MeshLab is a advanced mesh processing system, for the automatic and user assisted editing, cleaning, filtering converting and rendering of large unstructured 3D triangular meshes. MeshLab is actively developed by the a small group of people at the Visual Computing Lab at the ISTI - CNR institute, a large group of university students and some great developers from the rest of the world. For the basic mesh processing tasks and for the internal data structures the system relies on the GPL VCG library.
The Visualization and Computer Graphics Library (VCG for short) is a open source portable C++ templated library for manipulation, processing and displaying with OpenGL of triangle and tetrahedral meshes.
The library, composed by more than 100k lines of code, is released under the GPL license, and it is the base of most of the software tools of the Visual Computing Lab of the Italian National Research Council Institute ISTI (http://vcg.isti.cnr.it), like metro and MeshLab.
Quote from http://sourceforge.net/p/meshlab/discussion/499533/thread/836b4da1/
The source code of MeshLab for iOS and MeshLab for Android is not available for the general public. We can provide customized version of it, or license the viewing component under a commercial agreement.