Jabphone, allows you to call your friends on the phone using the Jabber Instant Messaging system. It uses libjingle, XMPP and Asterisk. All you need is to run GTalk (or any future client that supports Jingle), subscribe a specific gmail jid that acts as the gateway and you’re set. As easy to type “call 351 21 500 5000″ in your chat window. Pretty cool.