Skype lets you make free calls over the internet to other people on Skype for as long as you like, to wherever you like. It uses P2P (peer-to-peer) technology to provide voice-based communication with other Internet users.
Skype 126.96.36.199 Linux Portable can be used on Ubuntu 8.10/9.04 & Super OS 9.04 with the help of the RUNZ framework. It is free to download
Download Skype Portable (Requires RUNZ)