Resource Library with a host of useful IWB tools
http://www.triptico.co.uk/?page_id=8
Select components to achieve the given goal.
http://www.sciencenetlinks.com/interactives/powerplay.html
A Warehouse of Interactive Math lessons with definitions and examples, worksheets, Interactive Activities and other Resources.
http://www.mathwarehouse.com
103 interactive online maths activites (US)
http://illuminations.nctm.org/ActivitySearch.aspx
You can save your interactive online coloring pages that you have created in your gallery
http://www.thecolor.com