Lots of videos teaching you things - especially maths. Sound quality not great on all the 'Talks' videos/audio, but v. wide range of topics. Aimed at learners - i.e. people who want to learn things (rather than being for fun etc.) Worth a look.
The HumBox is a new way of storing, managing and publishing your Humanities teaching resources on the web. Share handouts, exercises, podcasts, videos and anything else you can imagine!