Robin Good: If you are looking for a free video conferencing solution, here is my selection of the top 15 (and more) solutions available right now online.
I have personally checked each one of them, and while you may not like each one, they all guarantee the ability to video conference with more than two people (FlashMeeting is the only exception I have included) without you needing to pay anything for it.
Some, as good as Vidyo or Zoom.us may provide HD quality video and even full support for mobile platforms. Others, like MeBeam or Sinfor offer bare-bone ad-supported solutions that have zero frills but can do the job if you need an immediate, zero-cost solution.
Check it out here: http://pinterest.com/robingood/top-15-free-video-conferencing-tools-2012/
P.S.: Feel free to suggest tools you know that should belong in this collection.
Via Robin Good, JoelleYalin, Jenny Smith, Official AndreasCY, Odile Dupont, Frédéric DEBAILLEUL