5 free resources on this topic. Everything here is free and hand-picked. You can also search within this topic.
Open-source workspace for notes, tasks, wikis and databases, built as a self-hostable alternative to Notion with optional local AI features. The core app is free and open source; an optional paid cloud service is offered separately.
Large open encyclopedia of blockchain and crypto projects, protocols and terms.
From the site: IQ.wiki is the world's largest blockchain and crypto encyclopedia. Explore thousands of wiki articles on cryptoassets, projects, protocols, exchanges, and more.
Why I recommend it: Entries are often written by people holding the asset described, so read them for the vocabulary, not the verdict.
Free online encyclopedia from xAI whose articles are generated by its AI models rather than written by human editors. Readers can suggest new articles and edits, which Grok checks against sources before approval; the homepage reports more than 1.1 million approved edits. Useful as a case study in AI-generated reference material and media literacy.
From the site: Grokipedia is an open source, comprehensive collection of all knowledge.
Why I recommend it: Verify anything you take from here against a second source. AI-written reference articles read confidently whether or not they are right, and its neutrality is actively disputed.
Open wiki encyclopedia covering computing, science and technology topics, edited collaboratively.
From the site: HandWiki is a wiki encyclopedia for collaborative editing of articles on computing, science, technology and general knowledge. Registered users can post and edit articles, books, manuals and tutorials. Login or request account using the top-right menu. We strongly encourage editors to use their real...
Why I recommend it: Useful as a starting point on a technical term, not as a citation. Open wikis vary in quality article to article — follow its sources.
Open wiki of biographies and company profiles, edited by contributors.
Why I recommend it: Many entries here are written by or for their subject, so read them as self-description. Check claims elsewhere before repeating them.
