A social software wiki page on design patterns for social software, categorised under trust and identity, collaboration, and communications. Click through twice to get to a longer list of patterns. Output from social software course.
F. Abbattista, F. Calefato, D. Gendarmi, und F. Lanubile. Automated Software Engineering - Workshops, 2008. ASE Workshops 2008. 23rd IEEE/ACM International Conference on, (September 2008)