P2P Video Streaming Software
Helix (Video Server) https://helixcommunity.org/
VLC (Player) http://www.videolan.org/
Vidtorrent http://viral.media.mit.edu/
Freecast http://sourceforge.net/projects/freecast/
Peercast http://www.peercast.org/
Stream 2 Stream http://s2s.sourceforge.net/
Nodezila http://www.nodezilla.net/
ACTLAB TV http://actlab.tv/
Google SeeCast http://code.google.com/p/seecast/
Trevbus http://www.trevbus.org/
P2P, Voip, Video Conferencing.
Tipicim (XMPP Clinet) http://www.tipic.com
Timp.net (XMPP Server) http://www.tipic.com
(tipic voip/video implementation is based on the following open source projects)
http://iaxclient.sf.net (basic voip stack) tipic added video, wideband audio and support for echo cancellation
http://www.speex.org (default audio codec ) tipic sponserd the echo cancellation improvments
http://www.theora.org (default video codec)
http://www.libsdl.org (video visulization in tipicim
Web Conferencing.
WebHuddle http://https://www.webhuddle.com/
Dimdim http://www.dimdim.com/