JeromeDL - e-Library with Semantics
.."With JeromeDL's social and semantic services every library user can bookmark interesting books, articles or other materials in semantically annotated directories. Users can allow others to see their bookmarks and annotations and share their knowledge within a social network. JeromeDL can also treat a single library resource as a blog post. Users can comment the content of the resource and reply to others' comments and this way create new knowledge"..