cloud

Are you talking about a small group all working together on an IPython notebook + source files? IPython doesn't (yet) support collaborative editing by itself, but SageMathCloud (https://cloud.sagemath.com/, source at https://github.com/sagemath/cloud) has patched IPython to have Google Docs-style collaborative editing. SageMathCloud is still using the latest IPython 2.x release (updated soon, probably in conjunction with upgrading the version of IPython in Sage). Still, it's probably your best bet right now for collaborative editing in IPython notebooks. That said, several IPython developers are working on adding Google Drive support, and I believe they are working on the collaborative editing capabilities as part of that.

1. There are no non-free parts of SageMathCloud (here it all is: https://github.com/sagemath/cloud). It used to all be closed source, since the University tech transfer office required it in order to work with me... but I've since open sourced everything as required by the grants. 2. Regarding your next question, "the grant" I linked to is actually a program solicitation. It's the instructions for people preparing grants for the program, and also the guidelines for other people reviewing these grant proposals. The thing that is actually legally binding on the university is what the actual grant itself says. In my case the grant said (basically) "We will release all code under the GPL." I didn't write that phrase -- some other co-PI on the grant did -- but it was still signed off on by my office of sponsored research.