Author Description
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.
Quick Facts

* Graphics, algebra and tables are connected and fully dynamic
* Easy-to-use interface, yet many powerful features
* Authoring tool to create interactive learning materials as web pages
* Available in many languages for our millions of users around the world
* Free and open source software



Compatibility: Multi-platform
License: Opensource / Freeware
Website: http://www.geogebra.org/
Download Page (portable version): http://www.geogebra.org/cms/en/portable

My Opinion: This is a must for anyone working, teaching, learning, creating tutorials, or anything related to geometry or algebra. One can create an interactive tutorial, graph or whatever, and export it to an interactive HTML page, a static PNG, etc. The only disadvantage I see is that the uncompressed folder is quite big, > 100Mb, so it should only be available as an optional installation, available when the user searches for new software. It shouldn't even be in the Ultimate version.

Sorry, but I did make a search. Maybe I searched only in the English forum...

Mickets

Hello Mickets,

You are right.
Your topic is back on english forum.

Actually visitors of English forum normally do not search French forum. Further it is difficult to understand French post for a English reader.