PreMiD

Wikidata acts as central storage of structured data for Wikimedia projects. Structuring data into a machine-readable format makes it easier to view, search, edit, curate, use and re-use files.

wikiHow - How to do anything!

Wikimedia is a global movement whose mission is to bring free educational content to the world. Through various projects, chapters, and the support structure of the non-profit Wikimedia Foundation, Wikimedia strives to bring about a world in which every single human being can freely share in the sum of all knowledge. *For usage in specific projects from the Wikimedia Foundation, please use the appropriate presences instead.*

Wikimedia Commons is the world’s largest free-to-use library of illustrations, photos, drawings, videos, and music.

Wikinews provides a free content alternative to commercial news sites with articles that are fact-checked and peer reviewed.

Wikipedia is a multilingual online encyclopedia, based on open collaboration through a wiki-based content editing system.

Wikiquote is a online collection of sourced quotations from notable people and creative works in over 75 languages. It also includes proverbs, mnemonics and slogans.

Wikisource is a library of freely-licensed source texts and historical documents, including poetry, government documents, constitutions of many countries, and general literature.

Wikispecies is a species database for taxonomy that covers living and fossil representatives of Animalia, Plantae, Fungi, Bacteria, Archaea, Protista and all other forms of life.

Wikiversity is devoted to learning resources, learning projects, and research for use in all levels, types, and styles of education.

Wikivoyage aims to create the world's largest free, complete and up-to-date worldwide travel guide.

Wikiwand is a modern reader for web and mobile, that optimizes Wikipedia's amazing content for a significantly improved reading experience.