Hi,
I am not sure if this has been mentioned here before, but I wanted to make people aware of this program I've been using lately: Tox.
It has most of the same features as Skype (Chat, Webcam, Voice etc.), but focuses on privacy and security.
Before Tox I used Pidgin + OTR Encryption (both great software), but I've noticed that when something is not easy to configure and install, most people/friends don't want to use it.
That's where Tox makes a difference... It's extremely easy to install and chat.
Messages
At your fingertips. You're always in the loop with instant encrypted messaging.
Calls
Stay in touch. Make free and secure Tox to Tox calls.
Video
Seeing is believing. Catch up face to face with a secure video call.
Security
Tox takes your privacy seriously. With leading-class encryption, you can rest assured knowing that the only people reading your messages are the ones you send them to.
Ease of Use
Unlike other secure messaging solutions, Tox does not require you to be a computer programmer to use it. Tox comes out-of-the-box with an easy-to-use interface that allows you to focus on your conversations.
Freedom
Tox is both free for you to use, and free for you to change. You are completely free to both use and modify Tox. Furthermore, Tox will never harass you with ads, or require you to pay for features.