Skype is the most popular free voice-over IP and instant messaging
service globally. It allows users to text, video and voice call over the
internet. Users can also call landlines and mobiles at competitive
rates using Skype credit, premium accounts and subscriptions. Skype was
publically released in 2003 and now accounts for roughly a third of all
international calling minutes. Skype uses P2P technology to connect
users on a multitude of platforms including desktop, mobile and tablet.
The call quality (depending on your internet signal) and additional
features like conversation history, conference calling and secure file
transfer are excellent. There have been some criticisms over the
programs bandwidth usage and security vulnerabilities.
Free internet calls without installation.
Download Portable Skype 6 Online (0.5 MB)
In first screen enter: 6.20.0.104
Extract and run SkypePortable.
Multi-Users: Edit SkypePortable.ini with User=NameOfNewUser (Default is Skype)
Don't forget to close in systray when leaving.
Settings of installed Skype should be preserved.