CoFFEE - the new groupware application for digital iscussions in a live classroom situation. It offers customisable tools, such as a threaded discussion forum, graphical concept mapping, voting and more. Open-source and free! Available in: English, French, Italian, Spanish, and Dutch.
Several different courses for teachers to learn how to apply web2.0 in the context of the classroom - all the courses and tools run in a moodle platform.