This is a great list of open source alternatives to common educational software tools. It begind with the usual suspects - Moodle for an LMS, Audacity for audio, Big Blue Button for synchronous conferencing, Kaltura for video streaming. But then it gets into some very niche applications: OpenSankoré for whiteboards, Molly for mobile, Q-Light for theatre and drama. Even if you are familiar with open source alternatievs for education, you might find something new here. Schoolforge has a similar but much briefer list, with some additional tools.