Instant, anonymous, secure, no-registration, no-download, browser-based P2P one-to-one video conferencing app. Max 2 parties. Free. www.Gruveo.com
Instant free videoconferencing with no signup, registration, login or download. It works instantly on any computer. Supereasy to use. Up to 4 people. www.vline.com
Unlimited free videoconferencing for sessions of up to 30 mins. Max 5 people for video, 10 for audio. Integrates presentation tools, document sharing and works across all platforms - www.Veeting.com
Persistent real-time collaboration rooms that integrate video conferencing and multiple co-viewing options (Youtube, Google Docs, Slideshare, Maps) - free for up to 5 participants - http://mashme.tv
Appear.in is a new free P2P video group chat and collaboration web app allowing you to instantly create a meeting room where anyone can be invited easily. Unlimited users (based on your bandwidth). mini-review: http://sco.lt/5IZlxJ - http://appear.in
Talky.io is a free browser-based real-time video-conferencing and screen-sharing app (requires WebRTC enabled browsers like Chrome and Firefox) - with Chrome v.30 and higher you can have as many participants as you want as you are in a P2P environment and are limited only by your effective bandwidth. http://talky.io
Mighty Meeting - Live web presentations with PDF and PowerPoint files across devices and OSes - free - up to 6 video-conferencing participants.
TrueConf - web-based for Win, OSX, iOS and Android - free version integrates recording, file transfer and whiteboard - for up to 3 people
Teambox - task management, file sharing, discussion and integrated scree-sharing and HD videoconferencing for up to 5 people for free.
Ninchat - Video IRC - persistent rooms that can be set to be "public" or "private" - up to 12 people concurrenctly can video chat - http://www.ninchat.com
Meet.fm - a new slick web-based full conferencing solution allows for free video-conferencing for up to three people - http://meet.fm
Google Hangouts - Web-based - Video conferencing for up to 10 participants. www.google.com/hangouts/