Skype
Free Internet phone for MAC, Linux and Windows. Call anyone, anywhere in the world which also has a Skype account for free. Make international phone calls (to regular phones) at local rates.
Google Talk
Google Talk is Google's instant communications service. Like Gmail, Google's free webmail service, Google Talk uses Google's innovative technologies to help people communicate more effectively and efficiently. This means Google Talk is fast, intuitive and fun to use.
CQPhone
CQPhone is a simple chat program that works like a real telephone. This program is free. There are no advertising banners. Enjoy using it. Tell your friends. Voice chat + Video chat + Typing chat. Share pictures and web pages. Works with dialup, DSL and cable modems. Every user receives a private phone number. Meet new friends on the public chat list. No cost. No registration. No adware. No spyware
Globe7
Free internet phone software which enables you to make free phone calls from PC to PC, and low-cost calls to traditional phones and mobiles (to almost anywhere in the world).
VoipCheap
FREE CALLS* to regular phones over the internet. Just install the free VoipCheap application, plug a headset in your PC and start calling instantly!
VoipDiscount
With VoipDiscount you can make free* calls over the internet to any of your online friends, as well as various popular destinations. Download it now for free and start calling immediately.
TunesUp TunesUp is not only a music player ...It is an amazing freeware tool to listen to music, internet radio, audiobooks, podcasts etc. as background theme together with your caller while you're skyping.
KishKish SAM
KishKish SAM™ is a simple voice answering machine for Skype™ users. When you are away from your PC and there is no one to answer your incoming Skype™ calls, KishKish SAM will pick up the call, play a greeting message and the "all-time classic beep", so the calling party will leave a voice recorded message.
TalkByPC
Free internet phone and video-phone program (+ service). This video phone with full collaboration features includes file/photo/voice/video transfer, desktop controller to remotely access another computer, whiteboard/telestrator/laser pointer that is similar to Video Conferencing.