Wikipedia:Tip of the day/2011 archive/January 4
Wikipedia is one of several projects organized under the Wikimedia non-profit foundation. There is also Wikibooks, a collection of collaboratively written textbooks, how-tos, and manuals. If you feel the urge to define words rather than explain them, you may want to take a look at Wiktionary, which defines words from many languages into English. While Wikipedia is not a place to post source materials, Wikisource is a repository for free text documents. Wikiquote is a collection of quotes organized in many categories. Commons is the Wikimedia projects' collection of images and media. Meta-Wiki is a wiki devoted to the coordination of the Wikimedia projects. Wikispecies is a directory of all kinds of life forms. Wikiversity is for educational and research materials and activities. Last, but not least, Wikinews is a free-content news source. You can promote development of all these projects by donating money to the Wikimedia foundation.
Read more: Wikipedia#Sister projects