Jitsi

Jitsi is a communications program that allows you to chat securely using well-supported protocols like SIP, XMPP / Jabber, AIM / ICQ, Windows Live, Facebook and Yahoo. You can also make audio and video calls and share or stream your desktop to someone else. Conference calls and call recording are also possible. Most importantly, all of these features can be used together with a strong encryption.

Image

Screenshots

What can I use it for

Chatting securely with other rights advocates

Pros

Allows you to integrate various communication protocols into one program

Platform (OS) Windows, Mac OSX, Linux

License FOSS

Website Jitsi

Difficulty Easy

Training Materials

https://jitsi.org/Documentation/SideBar

Alternatives

http://www.skype.com/en/
http://www.pidgin.im/
http://www.jabber.org/
http://adium.im/ (Mac OSX)

Tool category

Collaborative

Security