GeoGebra!

What is GeoGebra?

GeoGebra is dynamic geometry software. Constructions can be made with points, vectors, segments, lines, polygons, conic sections, inequalities, implicit polynomials and functions. All of them can be changed dynamically afterwards.

GeoGebra Free mathematics software for learning and teaching Download
Interactive graphics, algebra and spreadsheet From elementary school to university level Free learning materials

Web Searching Strategies in Plain English

http://www.commoncraft.com/video/web-search-strategies

Literature Map

http://www.literature-map.com/

Amazing Image Search Tools

WOW!

"Although Google has been playing with some fun image search toys in its lab and the official Google Image Search has recently significantly upped its game, some of its most hyped features — color search, instant scrolling, hover preview — are but mere shadows of sleeker, better versions that geekier, more sophisticated image search tools offer. Here are seven of our favorites.....READ MORE

http://www.brainpickings.org/index.php/2010/10/01/best-image-search-tools/