interaktable.com -- for use with the Epson BrightLink Projector.

There is also a BrightLink Solo product which adds the interactive functions to a non-interactive projector (i.e. you can use any existing projector with this).

–My thanks to Mr. Adam Tozer, Calvin College, for these resources.

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From DSC:
For use with the Epson BrightLink Projector, which can make any surface an interactive whiteboard.