After all the NSA revelations from Edward Snowden, a lot of new projects have emerged aiming to protect our privacy, especially through robust end-to-end encryption.
One of my first article on this blog was to present a serious opensource alternative to Skype, the quite popular Jitsi. Still actively developed, it’s probably the most promising alternative. But the objective of the project is not purely oriented on the privacy (Although they have good support of OTR and others encryption types).
It is more the case of Tox.
Indeed, with the revelation of governmental surveillance programs, Tox, a FOSS initiative is aiming to be an easy and all-in-one communication platform that ensure and respect the privacy of their users.
Decentralized by using torrent-style DHT, Tox directly uses UDP connections (better for Hole punching) and add encryption to it.
Tox supports messaging, calls and videos but note that it is still in alpha (So do expect some bugs)
It has been developed by a group of 4chan members and the project is hosted on Github.
If you are interested to give it a shot, here is their download page.
For more information, you can directly access their wiki.