free teaching tools - open source educational software

I'm putting together a list of open source educational software, that

*may* become part of a future projects, or to give to interns to play with.

The list, of course could be endless, so just considering things that are ready for production, a real 'market leader' or a project that shows real promise.

It's just a brain storm at the moment.  Anything obvious missing from this list?

*** LMS Tools (besides the obvious Moodle, Sakai, Canvas etc)

Chamilo     http://www.chamilo.org

Google Course Builder   https://code.google.com/p/course-builder/

*** Discipline Specific

WebWork http://webwork.maa.org (Mathematics)

*** Lecture Capture

Opencast Matterhorn http://opencast.org/matterhorn/

*** Web Conference/Collaboration

Big Blue Button http://www.bigbluebutton.org

*** Portfolio

Mahara https://mahara.org

*** Repositories

Dspace http://www.dspace.org

cheating in tradtional courses

http://etcjournal.com/2012/10/05/remote-proctoring-services-may-not-be-necessary/

free and paid attendance apps for teaching

For Android there is a simple free one called 'Attendance' that links with a Google Doc Spreadsheet so you can just grab the data from there once you're done. It's nice and easy.

The students can be added from an Excel spreadsheet or just pasted across directly to the Google doc.

For iOS there is one also called 'Attendance' for $5.49. It pulls info from a CSV or Excel spreadsheet but has a few additional features for writing notes etc.