Source code for Open Context (http://opencontext.org)
The project is discussed in detail here: http://opencontext.org/about
The project is evolving rapidly and we are planning a major refactoring for 2014. But it's available here for inspection (and for the brave, reuse) for all.
All the source code specific to this project is licensed uner a GNU-GPL license (v. 3) http://www.gnu.org/licenses/gpl.html
Open Context draws in libraries and frameworks from other sources (Leaflet, Zend, etc.). Please see the documentation associated with these libraries for additional licensing information.