BigBlueButton!

With ooVoo you can make free, high-quality video calls, voice calls, and send text messages to easily connect with your friends and family. Make clear and crisp video calls with up to 12 people at a time, on any device. Try it now!

Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for GNOME. Ekiga uses both the H.323 and SIP protocols. It supports many audio and video codecs, and is interoperable with other SIP compliant software and also with Microsoft NetMeeting.

Openmeetings provides video conferencing, instant messaging, white board, collaborative document editing and other groupware tools using API functions of the Red5 Streaming Server for Remoting and Streaming.

Apple Remote Desktop is the best way to manage the Mac computers on your network. Distribute software, provide real-time online help to end users, create detailed software and hardware reports, and automate routine management tasks — all without leaving your desk. Featuring Automator actions, Remote Spotlight search, and a new Dashboard widget, Apple Remote Desktop 3 makes your job easier than ever.

ÜberConference is the easiest and best way to make conference calls. Simply choose contacts from your address book and your conference will be created instantly. Participants don't even need to call in, as they will be dialed and/or sent an email invite to join.

Reliable, easy, effective web conferencing and online meetings.

Mark up websites, graphics, and photos, or start brainstorming on a blank canvas. Browse the web with your friends or make that conference call more productive than ever. No plug-ins, downloads, or firewall voodoo - its all here, ready to go when you are. Browser-agnostic, user-friendly.

Extremely low bandwidth video collaboration software that supports application sharing, desktop sharing, file sharing, and PTZ camera control. Also, this client is free without support for commercial, personal, and government use.

Adobe® Connect - Web meetings, eLearning, and webinars for the enterprise.

Webex: The leader in online meetings, desktop sharing, web conferencing, video conference, net meeting, web conference. Get a free 14-day trial of WebEx online meetings, the leading web conferencing and video conference solution for sales presentations, webinars, online training, remote support.

Zoom, the cloud meeting company, unifies mobile collaboration, cloud video conferencing and simple online meetings into one easy-to-use platform.

Instant screen sharing, web conferencing, remote support, desktop remote control and messaging. No downloads for particpants!

Fuze Meeting is the premier web conferencing tool that allows you to conduct online meetings rather than travel to far off places. It’s the easiest and most cost-effective way to hold online meetings, period. Our unique features include the ability to present and collaborate in HD including mobile devices!

Connect with anyone, anywhere, anytime – without the fuss! FreeConference.com lets you hold free conference calls in HD audio with up to 400 people at a time and download free online meetings with video chat and screen sharing. All FREE, with no hidden contracts or fees.

Groupworld - secure, customizable, cross-platform HTML5 web conferencing software with audio/video conferencing, desktop sharing and advanced whiteboard.