Please send add any additional resources you feel would be useful.
COPTR - COPTR describes tools useful for preserving digital information for the long term. COPTR is also an initiative to collate the knowledge of the digital preservation community on preservation tools in one place. Instead of organisationscompeting against each other with their own registries, COPTR is bringing them together. In doing so it's objective is to provide the best resource for practitioners on digital preservation tools.
Repository Software Survey, 2010 - Compares various repository tools such as CONTENTdm, Digital Commons, DigiTool, DSpace and others on various features including support, supported item types, metadata formats, User Interface Functions, Searching, etc.