1)   RinGo 0.6
Make voice calls from any PC in the world. Free voice connectivity with Internet users. RinGo allows you to make calls from any place in the world from your PC without the use of PSTN (traditional telephony provider) for local and international calls

 2)   VOIP Call Shop Billing Software 5.1
Call Shop Billing solution will help you start generating new revenue stream by providing low cost telecommunication services. In a typical call shop operation customers come to the location of the shop, make a telephone call from one of the phone bo

 3)   BeyondPhone 2.4.1.0
BeyondPhone is future of internet telephony. You can make substantial savings on every outgoing call. Call anywhere in the world from your computer. For high call clarity and low calling rates , for details visit our website http://beyondphone.com

 4)   IPi Phone 0.3
IPi Phone is internet IP to IP telephone software that allows you to talk and use text chat. IPi Phone is easy to use. All you need to know is the other person IP address and you can connect to them and start talking over the internet for free.