Atomic Learning is a pay site with many free demos. The site offers tutorial videos on many different topics including Windows software and Curriculum Tools.
This Web site offers a free and pay service for teachers. It has walk through demos of different software that they sell as well as popular titles. These demos are either a whole project from start to finish called recipes or one piece of the project called snacks.
http://www.tech4learning.com Learning Electric
Learning Electric has mini movies that will walk you through different applications such as Microsoft Office, Inspiration and KidPix. There are several videos for each application all explaining a different topic.
i4c offers online practice modules for several different software titles. These tutorials are not interactive but very useful with information for different versions of the software.