Does anyone know of a “self-hosted” or open source web conferencing application?

Question by RackmanagerPro: Does anyone know of a “self-hosted” or open source web conferencing application?
Does anyone know of a “self-hosted” or open source web conferencing application? Our company has very limited need to host web conferences. The current hosted solutions, WebEX, MSLive, Goto Meeting, are all either too expensive or don’t provide enough licenses to be useful.

Best answer:

Answer by samhainthirteen
https://www.webhuddle.com ?
I haven’t tried it myself, I just chanced upon it in a forum.

Another person suggested:
http://www.rhubcom.com

Know better? Leave your own answer in the comments!