Swirrl Wiki

Swirrl Wiki is a hosted web application focussed on simple and effective sharing of information, to help people run their businesses more effectively and to make better-informed decisions. Text-only collaboration isn't enough: Swirrl Wiki's wiki-based approach also integrates the kind of structured information you might otherwise keep in a spreadsheet or database. Swirrl Wiki stores this information as RDF and makes it easy for the user to add semantic information to their data in the context of their normal work, with no need for manual entry of semantic mark-up.

More information can be found at http://www.swirrlwiki.com