The Journal of Online Mathematics and Its Applications, Volume 7 (2007)
Creating Mathlets with Open Source Tools, Markus Hohenwarter and Judith Preinder

GeoGebra Wiki and User Forum

In order to enable educators to share their interactive materials created with GeoGebra, we use the GeoGebraWiki, an open pool of materials where everyone can contribute their dynamic worksheets and accompanying documents (e.g. lesson plans). In principle, this pool is simply a collection of pages with links to dynamic worksheets on the Internet. However, in a wiki users can not only change the contents but also influence the structure of the pages. So, if one of the topic pages in the GeoGebraWiki gets too long, anyone can break the pages into smaller pieces by creating several pages for sub-topics.

We also urge educators to upload their materials to the GeoGebra web server (see GeoGebra Upload Manager) or provide downloadable packages of their materials to ensure that others will be able to modify existing materials (see Creative Commons license). In the GeoGebra User Forum you can get support from colleagues. While the GeoGebraWiki is mostly a place to publish your finished work, the discussions in the user forum help to get answers to specific questions or solve technological problems while creating materials. 

The GeoGebraWiki and user forum can be seen as examples for the change from static web pages and libraries with unchangeable content towards a collaborative Internet that is driven by its users - in our case by a community of creative mathematics educators.