Here is a list of some useful communications programs:

AIM: (AOL (America On Line) Instant Messenger)

Instant Messaging, E-Mail, Text Messaging, Voice Chat, Video Chat, & More

MSN: (Microsoftsoft Network) Messenger:

Instant Messaging, Make Calls, Video Chat, File Share, & More.

Skype:

Instant Messaging, Video Calls, Conference Calling, Share Files, & More.

YIM: Yahoo Instant Messenger

Instant messaging, File Share, Make Calls, Photo Share, & More

OW: Outerworlds

3D Online Community- You Can: Message Friends Or Whisper, Save Locations, & Build A Home.

OW: DigitalSpace Traveler

3D Online Community- You Can: Explore Different Realms, Send Messages, & Voice Chat.