SAKAI
Sakai is an online Collaboration and Learning Environment. Many users of Sakai deploy it to support teaching and learning, ad hoc group collaboration, support for portfolios and research collaboration.
Sakai is a free and open source product that is built and maintained by the Sakai community. Sakai's development model is called "Community Source" because many of the developers creating Sakai are drawn from the "community" of organizations that have adopted and are using Sakai.
Integration
Stockholm university has developed support for shibboleth authentication for sakai. This work is currently presented as a set of patches which can be applied to a 2.3 or 2.4 source tree.
Currently you need to apply the following two patches: sessionend-fix.patch which fixes issues with the sakai session handling and su-shibb.patch which contains the main sakai shibboleth support.