MicroSIP is Free VO IP Voice Over IP software. It can be used to send and receive phone calls or video calls (Point to Point) for Free by IP address. The application supports sending to other people who use the software, or to telephones via your favorite non-free SIP provider.
Loudtalks Lite is a Free Portable Tool that supports Push to Talk (PTT) Voice Over IP (VOIP) communication. It functions similar to popular software like Skype. However, with it's distinct advantages, some consider Loudtalks a Skype Replacement. Real Time, Face to Face like voice communication. It's Unobtrusive, you can listen when you want. You can receive messages if you are not at your PC and listen to them later on. You can have multiple independent conversations simultaneously. You can also have live group voice conversations with a few to hundreds of people at once. There are versions for Windows Mobile and Windows devices (So you can also run it from your phone).
PicoPhone is a Free VOIP Internet Phone application with chat. The author created PicoPhone because most Internet phones use overly complex protocols that can cause problems when used with NAPT routers. PicoPhone uses a simple UDP-based protocol and works well with NAPT. Connections are accepted on UDP port 11676.
12Voip is free Portable Voice Over IP software (Internet Phone). Like many other VOIP products, it enables a computer user with internet access to have superb high quality voice conversations with friends and relatives from all over the world. Using this tool, you can call landlines or even mobile cell phones for free * in the USA and many other Countries, using only a computer and an internet connection. You can also call online friends using peer-to-peer calls.
Making Skype Portable; Skype is one of the more popular VOIP or Voice over IP peer to peer telephony clients. VOIP clients allow you to communicate with others using your internet connection. In the following tutorial, we explain how to run Skype from a USB device and bring the application with you, wherever you go.
