GNU Telephony
URL = http://www.gnutelephony.org/
=Description-
"GNU Telephony is a meta project to enable anyone to use free as in freedom software for telephony, and with the freedom to do so on any platform they choose to use. We also wish to make it easy to use the Internet for real-time voice and video communication, and in fact for all forms of real-time collaboration. Finally we wish to make it possible to communicate securely and in complete privacy by applying distributed crytographic solutions. Our goal is to enable secure and private real-time communication worldwide over the Internet that is free as in freedom, and is also free as in no cost too!" (http://www.gnutelephony.org/index.php/GNU_Telephony)