Wikibooks offers free, open-content textbooks and learning resources on a wide range of subjects, available for anyone to read, use, and share.
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Wikibooks is a collaborative platform where you can find and contribute to free textbooks and educational resources on countless topics. Whether you're looking for study materials, practical guides, or in-depth textbooks, this site makes it easy to browse and access quality content created by a global community.
You can explore featured books, browse by subject, or even check out specialized sections like the Cookbook for recipes or Wikijunior for kid-friendly content. The open format encourages you to participate—add your knowledge, update materials, or join discussions in the community forum.
With resources available in dozens of languages and a focus on open sharing, Wikibooks is perfect for students, educators, or anyone eager to learn. It's a welcoming space to find, use, and help build a growing library of educational books.
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Wissen.de ist ein deutschsprachiges Wissensportal mit Lexika, Wörterbüchern, Wissenstests und geprüften Infos rund um Allgemeinbildung und Alltag.
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Russian-language site offering dictionaries and encyclopedias to help you find definitions, explanations, and detailed information on various topics.
Spanish-language biographical encyclopedia from the Real Academia de la Historia, offering detailed profiles on notable figures from Spain's history.
Find dictionaries, maps, books, and language tools for countries around the world. Explore resources to learn about languages and cultures. (French site)