The document summarizes the work of the CoLearn research community which investigates how OpenLearn tools can support informal and collaborative learning. It presents examples of uses of tools like FlashMeeting, Compendium, FlashVlog in online courses and seminars to engage learners, promote participation and help develop critical thinking skills. The tools allow learners to organize and share knowledge using multimedia like text, audio, video and maps. The CoLearn community shares resources through its online space and investigates how these tools can foster meaningful learning and help build learning communities.