LiLi - the database to e-learning material in physics consists of well documented links with meta data and a search engine of distributed sources.
Everyone can do queries, entries, comments and ratings.
http://www.physik-multimedial.de/lili/golili/start.php?layoutcvpmm=1

LiLi searches across at present 2.644 carefully picked worldwide distributed eLearning sources. These are analyzed and enriched with eLearning Metadata.
The search can then be extended to a much larger set of (unchecked) eLearning material from a large set of trusted Physics Institutions around the world (LiLi-Harvest).