JavaScript Archive Network is a comprehensive resource for Open Source JavaScript libraries and software. This infrastructure is considered to be beta.
Everything should be usable, to a certain degree.
JSAN
Diigo (dee'go) is about "Social Annotation". By combining social bookmarking, clippings, in situ annotation, tagging, full-text search, easy sharing and interactions, Diigo offers a powerful personal tool and a rich social platform for knowledge users.