Gimpel3D 2D/3D Stereo Conversion Software is now opensource! The code has been released under the GPL and is available at: sourceforge.net/projects/gimpel3d
An alternate link for the codebase can be found here: dl.dropboxusercontent.com/u/5171737/G3D/G3DCodeBaseFULL_11_17_2013.zip
Developed by René Gimpel (an independent stereo researcher) between 2008 and 2011, Gimpel3D is recognized for its advanced modeling features not seen in similar programs (including commercial packages at the time of release).
Since the original freeware release, many of the ideas presented in G3D have become standard features in commercial software. As a result, there is no significant advantage to developing G3D as a stand-alone proprietary solution, although the codebase makes a nice platform for future research and experimentation.
René Gimpel has released all source code for G3D under the GPL so that other stereo researchers, hobbyists, and/or professionals can build upon his existing work, and integrate/test new capabilities using the projective modeling environment.