GeoGebra is dynamic mathematics software for all levels of education that brings together geometry, algebra, spreadsheets, graphing, statistics and calculus in one easy-to-use package.
Great PDF that really relates Geometry to professional work, particularly in Engineering. I'd love to be able to watch the movie that goes along with it.
This activity develops thinking skills and facts for shape at KS1, KS2 and KS3. Simple ideas and a great range of activities lead to real exploration of properties of 2-D shapes. You can find this resource and many more at ccjmaths.co.uk
NEW Straws 2 is now available, with another 4 activities.
A large maths worksheet site where you can create sheets for a range of primary and secondary topics. [Be aware - site contains advertising and pop-ups]
http://ictmagic.wikispaces.com/Maths