LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
Call2friends - High-quality cheap and free international calls online to any mobile or landline numbers from internet and free calling app - cheaper than other VoiP providers. Try it now!
MyChat - Secure instant messenger for any network
Make Free Calls Online - Make Free Calls Online is a web application that, as the name suggests, allows its users to make international and local calls for free.
BORGChat - BORGChat is a LAN messaging software program.
Poptox - Poptox is a web application where you can communicate with people in every corner of the world.