Internet Communication
Google Talk Excellent sound quality. Fast download - about 3 minutes on a modem (900K) You must have a gmail account to use this program at this time.
Skype Skype is free and simple software that will enable you to make free calls anywhere in the world in minutes.
Bold Chat FREE live chat service for web sites to do live help and live support chats with visitors. Microsoft .NET Framework Redistributable 1.1 and Internet Explorer 6.0 or above required (Large file with easy installation. Works very well. )
CQPhone is an easy to use PC-to-PC phone, that allows voice chat, as well as video chat and text chat. Once you install the software, you will be automatically assigned a phone number, no registration or sign up required. The sound quality is very good.
MSN Messenger Version 7 MSN Messenger integrates into many Windows applications, including IE, Outlook and others.
PalTalk  Paltalk is an Internet audio/video chat client offering a wide range of features that allow users to communicate with other users anywhere in the world, at any time, in any mode--all for free.
PicoPhone is a tiny and easy to use Internet phone. The program is a single executable file, just start it, enter the IP address (or computer name) of the other party and connect.
TeamTalk is a small and easy to use IP based voice conferencing application that allows you to talk to your friends and colleagues using the internet or local network as audio carrier.
FireFly is an Internet Phone program, that allows you to talk to friends anywhere in the world, using the Internet and the free Firefly software. It now outranks SKYPE based on user opinions, including mine! (I always did like it!) The interface is very easy to use, just punch the number of your (Firefly) contact, or select it from the address book. The program also includes a voicemail feature to keep track of calls while you are away or talking to someone else. The program uses your internet connection and voice over IP technology, so there is no charge for these calls. The people you call however need to have the FireFly software installed.