Build Your Own X
Curated collection of 390+ tutorials to rebuild popular technologies from scratch. 31 categories (database, OS, programming language, web server, blockchain, neural network, game engine, shell, git, Docker, regex engine, search engine, etc.) covering 39+ languages. ~532k GitHub stars.
Strengths
- Learn by building: recreate databases, OS, languages, web servers
- 31 technical categories covering 39+ programming languages
- Active community since 2018 with regular contributions
- Beginner to expert: simple CLI projects up to distributed systems and compilers
Limitations
- Variable quality across tutorials, some are dated or incomplete
- No structured path, free navigation in a long list
Best for
- Deeply understanding technologies used daily
- Educational side projects and technical challenges