I provide Screencasts for a variety of customers, most notably at ScreenCastsOnline. A portfolio of some of my productions are available below and if you would like a quote for your own piece of software, then feel free to contact me.
ScreenCastsOnline - OmniGraffle for Mac Part 1
ScreenCastsOnline - Microsoft Excel Tips
Hook - An Introduction to Hook
Apptorium - Getting Started With Workspaces
Apptorium - Getting Started with Sidenotes
ScreenCastsOnline - Increasing Productivity with TextExpander