Skype was written in Delphi which made it easy to download to users with any Windows machine without having to worry about users having to download MB’s of java or .NET support files.

This ease of configuration from the net was one of the reasons that made Skype so popular.

It will be interesting to see what Microsoft does with it now that Google is also entering into the VOIP marketplace with its Google Voice product which uses SIP addresses (SIP technology is now in some of the new mobile phones) – Google Voice is currently only available in the US.