LibDreamSpeak is an example implementation of the TeamSpeak2 protocol (client-side) in Java. Some day it may be used as base for alternative TeamSpeak2 (mobile?) clients.
SIPatHome was based on the SIP Express Router (SER) which is a well-tested, configurable, free and RFC3261-compliant SIP proxy. The project was providing VoIP server software for the embedded Linux distribution OpenWRT on affordable Linksys WRT hardware.