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Build Your Own X is a curated collection of tutorials and guides that walk you through re-implementing core technologies from scratch. The idea is that by building things yourself—emulators, OS kernels, databases, web servers, etc.—you gain deeper understanding of how they work. It’s not a single software project but a knowledge repository with external links, organized by categories of technologies.
Features
- Large number of guides under many technology categories: e.g. 3D renderers, operating systems, file systems, game engines, network stacks etc.
- For many guides there are implementations in multiple languages (C, Rust, Python, JavaScript etc.) so you can pick your preferred stack
- Tutorials are usually step-by-step, often with source code, blog posts, or repos you can study
- Covers both theory and practice: you get the conceptual background plus code or pseudo-code to implement features
- Community maintained: many contributors link new tutorials, fix broken links, improve organization
- Actively used by learners as a reference, a source of projects/ideas, or as textbooks of sorts
Project Samples
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nel_h2
Simply solve complex auth. Easy for devs to set up. Easy for non-devs to use.
Custom auth drains 25% of dev time and risks 62% more breaches, stalling enterprise deals. Frontegg platform delivers a simple login box, seamless authentication (SSO, MFA, passwordless), robust multi-tenancy, and a customizable Admin Portal. Integrate fast with the React SDK, meet compliance needs, and focus on innovation.
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