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DevDocs
Open SourceReferences · Documentation & Learning
Fast, offline-capable API documentation browser combining 100+ references.
documentationreferenceoffline
Discover the 13 best open-source tools for documentation & learning. Community-driven, transparent source code with permissive licenses. Curated, compared, and updated for developers.
| Tool | Pricing | Platforms | Top Strength | Link |
|---|---|---|---|---|
| DevDocs | free | web | 200+ official docs (MDN, languages, frameworks) in one fast, offline-capable UI | Details → |
| freeCodeCamp | free | web | Completely free, structured curriculum from HTML to full-stack projects | Details → |
| The Odin Project | free | web | Free, opinionated full-stack path (Ruby or JS) built around real projects | Details → |
| roadmap.sh | free | web | Best visual maps of what to learn (frontend, backend, DevOps, AI) and in what order | Details → |
| Exercism | free | web | Free coding practice and mentoring in 70+ languages. | Details → |
| DevHints | free | web | Cheat-sheet density is excellent — one page refreshes a whole tool | Details → |
| QuickRef.ME | free | web | Clean, modern cheat sheets for languages, tools and Linux commands | Details → |
| tldr pages | free | cli, web | Community-maintained, practical examples for every CLI command. | Details → |
| javascript.info | free | web | The Modern JavaScript Tutorial — the deepest free JS reference from basics to advanced browser APIs. | Details → |
| System Design Primer | free | web | The most-starred system design study guide — scalable architectures, trade-offs and exercises, free and open source. | Details → |
Showing top 10 of 13. Browse the full grid below.
References · Documentation & Learning
Fast, offline-capable API documentation browser combining 100+ references.
Courses & Tutorials · Documentation & Learning
Non-profit curriculum with free courses and certifications.
Courses & Tutorials · Documentation & Learning
Free, open-source full-stack web development curriculum.
Courses & Tutorials · Documentation & Learning
Community-driven developer roadmaps, guides and skill assessments.
Practice & Challenges · Documentation & Learning
Free coding practice and mentoring in 70+ languages.
Cheatsheets · Documentation & Learning
Rico's cheatsheets: concise cheatsheets for dozens of tools and languages.
Cheatsheets · Documentation & Learning
Clean, searchable cheat sheet collection for developers.
Cheatsheets · Documentation & Learning
Community-maintained, practical examples for every CLI command.
References · Documentation & Learning
The Modern JavaScript Tutorial — the deepest free JS reference from basics to advanced browser APIs.
References · Documentation & Learning
The most-starred system design study guide — scalable architectures, trade-offs and exercises, free and open source.
Practice & Challenges · Documentation & Learning
Free, curated interview prep: algorithms study plans, behavioral questions and resume advice by ex-Facebook engineers.
References · Documentation & Learning
The largest curated directory of free public APIs — 1,400+ entries across 40 categories with auth requirements noted.
Courses & Tutorials · Documentation & Learning
Blog tutorial open-source berbahasa Indonesia — Linux, Python, JavaScript dan dasar pemrograman, gratis selamanya.