Wikimedia.org gives you access to all Wikimedia Foundation project websites, like wikipedia, wikibooks, wikisource, wikinews, wikiquote, wikispecies, wikiversity, wikimedia commons, and meta-wiki.
In wikinews everyone can contribute, and every article is being written collaboratively for a large-scale audience. Published articles will appear on their main page. Wikisource is an open library which provides source texts that happen to be available in the public domain or are legally offered for free redistribution. On the wikimedia commons site you can have access to a media warehouse, created and maintained by volunteers. Wikipedia is a free online encyclopedia. Wikibooks is dedicated to provide their visitors with free textbooks. Wikispecies is an online database made for scientists and non-scientists to reproduce the diversity of life on our planet. In wikiquote you can find tons of quotations which have been written by readers. Wikiversity gives you knowledge resources as well as textbooks and encyclopedia articles. 
