Peersite is a suite of components (servlets, tag libraries, java classes etc) for creating and managing social market network web-applications: that is, a social network with added market functionality, for example using pseudo-currencies.
The Floranta libraries provide components for building Rich Client Wikis using AJAX or Java. Floranta clients can be embedded in any webpage (even plain html) and allow users to leave notes, images, cards, etc on the pages. Eg: http://www.floranta.com
jboard is a bulletin board project written in java. it relies on struts, jaas, tiles,hibernate, jstl, log4j, xhtml and css2. it has been build to enhance some knowledge on these libraries. this project was a prototype, and is no longer supported.