This listing, I hope, may help you find the right social bookmarking service and understand the different kinds that exist. (exempt for some Specialized bookmarking, I have mainly limited this list to web pages, HTML. Not videos like dabble, maps like Tagzania, rss like wigzag...).
This project focuses on the digital research data of the faculty and critically examines the storage, maintainance, cataloging, and collaboration efforts in order to gauge the informatics needs on campus.