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quantecon.org favicon

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minnesotawildflowers.info favicon

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Step-by-step knot animations for every skill level

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Worldwide Open4us.org Alternatives

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Hear and share name pronunciations worldwide

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Find, share, and request the correct pronunciations of names from around the world with this crowdsourced pronunciation guide for people and places.

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Instantly look up Big-O complexities for algorithms

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Quickly find time and space complexities for popular algorithms with this easy-to-read Big-O cheat sheet, perfect for interview prep and study.

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Browse free lessons for coding and data skills

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read-stack.cp20.dev favicon

Track and organize unread tech articles easily

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ReadStack is an app that helps you keep track of unread tech articles, making it easy to organize and catch up on technology reading. (Japanese language)

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Find useful tips and travel info in one place

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상식닷컴 shares practical facts, tips, and guides on everyday topics and global travel, helping users learn and prepare easily in multiple languages.

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Dreevoo.com offers easy guides and tips for learning software, languages, cooking, and home skills, making knowledge accessible for everyone.

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Identify mushrooms with expert guides

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Find detailed guides and identification keys for mushrooms, including species info and expert resources for learning about fungi in North America.

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Identify Finnish plants and animals easily

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LuontoPortti is a Finnish site for identifying plants and animals, offering nature guides, educational resources, and tools for school projects.

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