Math+software+(freeware+and+commercial)

Add freeware and commercial software helpful in mathematics ...
 * Name || URL || Price || Strengths ||
 * Geogebra || http://www.geogebra.org/ || FREE! || Algebra+Geometry+Spreadsheet+works with Moodle+easy HTML export ||
 * Mathletics || http://www.mathletics.com/ || $10 AUD/Student/Year || Awesome For Homework -- Gives Students Instant Feedback & Help ||
 * 10 Quick Questions ||  ||   || Very Useful for Review or Even Teaching. Kids get excited to compete against each other. ||
 * Excel ||  ||   ||   ||
 * Mathematica ||  ||   ||   ||
 * Graphmatica ||  ||   ||   ||
 * Wikipedia || http://www.wikipedia.org/ || $0 HKD/Student/Year || Actually Quite Good for Math ||
 * Wolfram || [] ||  ||   ||
 * Logger Pro || http://www.vernier.com/soft/lp.html || $150(?) site license || Can use with vernier probes or standalone. Use it to graph with student videos (lots of samples included). Ex: video basketball shot and plot the motion to get quadratic. VERY EASY. 5 minutes to learn. ||
 * Quick Graph ||  || Free apps || a graphical software for IPhone, IPod Touch or IPad. ||
 * Ko's Journey ||  ||   ||   ||
 * Mathsonline || http://mathsonline.com.au/ || Free || Mathematics website that includes worksheets. videos and you are able to set tasks once you have assigned a class to a teacher. Really easy to use. ||
 * Free Graphic Calculator ||  ||   || Another IPad/IPhone Apps. ||
 * Math Ref Free ||  ||   || Another IPad/IPhone Apps. A Guide for lots of formula for students to revise on the road. ||