http://trinket.io/ - fyi. looks promising. i signed up to be notified. apparently they tweeted about CC textbooks from their account so could be developed with an open slant…
Yeah, they do say “We believe that openness is key to the future of education”. I also signed up to be notified
ohh… its coursefork rebranded! see https://groups.google.com/forum/#!msg/school-of-open/tJD6mI77FCY/RI_JaZCBEvYJ