PyleWiki is a WikiClone written entirely in Python that allows a group of people to collaboratively edit a tree of webpages using nothing but their browser and a simple, text-based markup language. This particular WikiClone has a few extensions to the original: attachments to pages, user authentication (primitive), and the use of templates for page styling among others.
Sipcat is a software IP telephony system that helps businesses increase productivity and reduce telecommunication costs. It allows you to start running your own voice over IP PBX in a matter of minutes. It contains a complete Linux distribution, including Asterisk and all required 3rd party software.
Easy Cast du Multi Hub (ecmh) is a networking daemon that acts as a full IPv6 MLDv1 multicast router. This allows IPv6 multicast routing on Linux. It will also allow IPv4 to IPv6 and IPv6 to IPv4 translation of multicast traffic, allowing multicast where it is not yet available otherwise. This code runs on the SixXS POPs, where this daemon runs on the POPs and let it easily do multicast IPv6. This allows the m6bone to grow and provide IPv6 multicast to end users. Users can deploy this software to enable their networks with multicast.