Do you know the world of wikis ?

Ever heard of ... ?

• Wikipédia should not be introduced anymore ...
• Wiktionnaire (dictionary)
• Wikibooks (educational books)
• Wikiquote (quotations)
• Wikisource (library)
• Wikinews (news)
• Wikiversity (educational community)
• Wikidata (databases)
• Commons (images and multimedia)

And even

• Wikivoyage (tourist guide)