Keyczar is an open source cryptographic toolkit designed to make it easier and safer for developers to use cryptography in their applications. Key rotation and versioning.
FOSSCoach is a series of events designed to share and improve the essential skills required to participate in collaborative, free and open online projects.
NetWorkSpaces (NWS) is a powerful, open-source software package that makes it easy to use clusters from within scripting languages like Matlab, Python, and R.