Over the weekend I watched technology news and brought me to this!http://sketchometry.org/
It's similar to Geogebra but is offered as a sketching tool on the web, iDevice or android.
Math is fun is another site but isn't as detailed.
I saw this online this morning. Teaches Financial Maths http://enchantedcollar.com/videos/
Math Tab is good fun and lets you play around with things http://www.mathtab.com/ or Math cast is another I picked up from the NDLR Research Symposium yesterday at the conference in Limerick http://mathcasts.org/
This is brilliant, supports project maths and does everything in videos as a supplement to understanding problems outlined in the classroom. http://www.themathstutor.ie/