The Wikimedia sister projects are the publicly available wikis operated by the Wikimedia Foundation (including yours truly, the Wikipedia). The "basic" sister projects are the Commons, Wikibooks, Wikinews, Wikiquote, Wikisource, Wikispecies, Wikiversity, Wiktionary. There's also the Wikimedia Foundation wiki itself; Meta, which coordinates and documents what the Foundation is doing; the Wikimedia Incubator, where people can start an alternative-language version of a project; MediaWiki, where the software that all of this runs on is discussed and improved; and the Outreach wiki, plus a few others. Let's take a glimpse into what's going on with two of these.