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A place to view and share educational material made of small knowledge chunks called modules that can be organized as courses, books, reports, etc. Anyone may view or contribute.  An awesome site for curriculum redesign and sharing

Trick.ly is a free service that shortens and password protects web links you want to share with select individuals on the internet. Rather than rope you and your contacts into a new social network, Trick.ly allows you to share with people on-the-fly.

Amazingly effective disk file recovery tool.

collection of applets that are designed for use in mathematics courses below the level of calculus, including algebra, geometry, vectors, trigonometry, pre-calculus, advanced graphicing and other courses

A collection of GeoGebra Calculus applets for use with Geogebra.

Lists of helpful resources from a mathematics teacher who specializes in training teachers how to use GeoGebra.

Open-source, multiplatform video transcoder

Open source photo booth software.  Basically a server for a webcam. Very simple and friendly.