Sakai - Historically, the community has aligned around a single project, the Sakai Collaboration and...
Xmind - Xmind is a brainstorming and mind mapping application.
Open edX - Open edX is implemented mostly in Python (with some Ruby and NodeJS as well) and the code is being...
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Open Elms - Open Elms: e-learning Learning Management System for Business
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.