GeoGebra is free and multi-platform dynamic mathematics software for all levels of education that joins geometry, algebra, tables, graphing, statistics and calculus in one easy-to-use package. It has received several educational software awards in Europe and the USA.
A link which downloads CPMP tools which has important tools which we use during class such as a Computer Algebra System (CAS) or a Statistical Analysis tool.
Math IS Fun
A website promoting learning of math in a fun way!
National Library for virtual manipulative math activities
The National Library of Virtual Manipulatives (NLVM) is an NSF supported project that began in 1999 to develop a library of uniquely interactive, web-based virtual manipulatives or concept tutorials, mostly in the form of Java applets, for mathematics instruction (K-12 emphasis).
Students can make use of our extensive library of content, including interactive challenges, assessments, and videos from any computer with access to the web. Each problem is randomly generated, so you never run out of practice material. If you need a hint, every single problem can be broken down, step-by-step, with one click. If you need more help, you can always watch a related video.