Wikipedia is a free online encyclopedia created and edited by volunteers around the world.

OpenStreetMap is a free wiki world map.

Wikimedia is the best platform for free knowledge and is used by millions of users worldwide to access and share information.

wikiHow is a how-to guide website for various topics and is used by individuals seeking instructional content.

MediaWiki is the best collaboration platform for knowledge management and is used by organizations and communities worldwide.

Wiki.js is a powerful and extensible open source wiki software designed for creating and managing knowledge bases and documentation.

Fandom is an entertainment platform for fans of TV, movies, and games.

Wikidata is the best knowledge base for structured data and is used by researchers, developers, and organizations worldwide.

Wikiquote is the best free quote compendium for famous quotes and is used by writers, students, and quote enthusiasts.

Wikibooks is the best platform for free textbooks and is used by students and educators worldwide.

Wikivoyage is the best free travel guide for global travelers and is used by adventurers seeking comprehensive travel resources.

Namu Wiki is the best community-driven wiki for collaborative knowledge sharing and is used by curious learners and researchers.

Wikiwand is an AI-driven wiki aggregator for knowledge consumption and Wikipedia enhancement.

Wikimedia Foundation is the nonprofit organization that hosts Wikipedia and supports the technology, people, and policies enabling reliable, free access to knowledge globally.

PBworks is a secure, hosted online team collaboration software for capturing knowledge, sharing files, and managing projects for businesses and education.

WikiTravel is the best travel guide for adventure seekers and is used by travelers looking for unique destinations.

The official wiki for the W3C CSS Working Group, detailing CSS specifications, resolutions, open issues, and public involvement in web standards development.

Webwiki is a website search engine and review platform for the German internet, providing user ratings and popularity rankings for websites and online shops.

DBpedia provides open knowledge graph resources, data downloads, and linking infrastructure derived from Wikipedia for researchers and industry.

WikiArt.org is a visual art encyclopedia and searchable image database featuring paintings, photographs, artist biographies, and artwork details.

Versicherungs-Wiki is an insurance information portal in Germany focused on providing comprehensive insurance knowledge and comparisons.