Daisy is an open source, Java-based content management system with a two-tier architecture: a Wiki-like editing/management front-end, and a standalone repository server. One of its key features is the clear separation between back- and front-end, using an HTTP/XML-based ReST-like interface.
Outerthought is the main organisation behind Daisy, and has been exploring various models behind effort-shared commons development for the past 4 years. About 300 subscribers participate with the actively-used Daisy mailing list. The Daisy community consists of individuals, companies and larger corporations.