hackclub/RAM-a-thon

roadmap.sh is an open-source collection of role- and skill-based learning roadmaps maintained on GitHub as nilbuild/developer-roadmap, with 364,300 stars and 44,772 forks. Each roadmap renders as an interactive diagram whose nodes link to a short markdown write-up, and the repository also bundles best-practices guides and self-test question sets alongside the roadmaps themselves.

Coding Interview University is a GitHub repository maintained under the jwasham account that lays out a checklist-based study plan for the computer science fundamentals a software engineering interview tests. It covers sorting, trees, and graphs as a required track, then an explicitly optional back half on system design and extra tree structures for engineers with more experience. The README frames it as the author's own multi-month self-study process, later published for others to follow, and community members have translated it into multiple languages.

trimstray/the-book-of-secret-knowledge is a highly-starred GitHub repository, with 238,124 stars and 14,099 forks, offering a curated collection of resources for system and network administrators, DevOps, pentesters, and security researchers, though it aims to be useful for everyone. It compiles inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, and CLI/web tools, organized into main chapters such as CLI Tools, GUI Tools, Systems/Services, Networks, Hacking/Penetration Testing, and Shell One-liners. The project emphasizes quality over quantity, welcoming contributions that are inviting, clear, not tiring, and useful, with an active RSS feed for updates.

OSSU Computer Science Curriculum is a GitHub-hosted list at ossu/computer-science that sequences free, third-party university and MOOC courses into a full computer science education. It groups coursework into Intro CS, Core CS (eight required subject areas), Advanced CS electives, and a peer-evaluated Final Project, with each course annotated by duration, weekly effort, and prerequisites. The README frames it as an alternative to a CS degree, not a shortcut: it follows the CS 2013 curricular guidelines and expects the learner to supply their own structure and motivation.