DACS is a light-weight single sign-on and role-based access control system providing flexible, modular authentication methods and powerful, transparent rule-based authorization checking for Web services, CGI programs, or virtually any program.
WireShare is a fork of LimeWire. It is based on a snapshot of the source to LimeWire Pro without any spyware, a.k.a. LimeWire Pirate Edition.
CORBA for Ruby.
A tiny, easily embeddable HTTP server in Java.