KIWi - Knowledge in a Wiki
KiWi is a flexible platform for building semantic social software applications (currently: Semantic Wiki and the TagIT). It provides the core services required in such applications, like editing and tagging, the storage of content and associated meta-data, its own triple store, transactions and versioning over content and meta-data, linked open data server, and much more. KiWi is currently in alpha stage and targetted at early adopters and interested developers.
Go start a discussion on this project's forums