Eduwikipedia is a collaborative wiki project covering the use of Web 2.0 and other technology tools in education. This is a great way to share what you know or learn something new.

WikiMapia is a "wiki meets Google Maps" mashup intended to be used as a digital geographic encyclopedia reference tool. In its current incarnation, WikiMapia is a little rough around the edges, but keep this site on your list of potential teaching tools.

Placeopedia is an open source mashup of Google Maps and Wikipedia. Using this site, students can connect existing Wikipedia articles with their corresponding location on the map, and then make use of the community generated database to "browse, use, or syndicate the whole lot."

The Simple English Wikipedia is an online encyclopedia for students in grade school, EFL/ESL classes, or anyone else learning to read and comprehend the English language.

Encyclopodia is a free software project that brings the Wikipedia, which is one of the largest encyclopedias on the world, on the Apple iPod MP3-Player. It has been successfully tested on a third-generation iPod and on an iPod mini, but it should also work on other iPod generations.

MemoryArchive, launched by Marshall Poe of The Atlantic Monthly, is a collaborative storytelling project which aims to provide a forum for people to share their common stories and preserve them for future generations.

Qwika is a search engine designed specifically to search wikis. Our aim is to cover all sizeable wikis in all sizeable languages, translate them, make them easily findable in the shortest possible time.

Curriki is an online environment created to support the development and free distribution of world-class educational materials to anyone who needs them.