Most people know only Wikipedia but check this list of all Wikimedia projects:
- Wikipedia (Encyclopedia) http://www.wikipedia.org
- WikiQuote (Quotes of famous people) http://en.wikipedia.org/wiki/Wikipedia:Wikitionary#Wikiquote
- WikiMediaCommons (Pictures,Audio,Video) http://commons.wikimedia.org/wiki/Main_Page
- Wikitionary (Dictionary) http://en.wiktionary.org/wiki/en:Main_Page
- Wikibooks (Books and manuals) http://en.wikibooks.org/wiki/en:Main_Page
- Wikisource (Source Code) http://sources.wikipedia.org/wiki/Main_Page:English
- Wikispecies (Animal Species) http://species.wikipedia.org/wiki/
- Wikinews (News) http://en.wikinews.org/wiki/Main_Page
- MetaWiki (Wikimedia Project Coordination)
- Wikimedia Foundation Homepage http://wikimediafoundation.org/wiki/Home
- Wikimedia page on Wikipedia http://en.wikipedia.org/wiki/Wikimedia
- Wikipedia Sister projects http://en.wikipedia.org/wiki/Wikipedia:Wikitionary
http://www.usemod.com/cgi-bin/wiki.pl?WikiMedia (about Wikimedia on UseMod