I'm really interested in understanding code as complex systems and I'm on the lookout for some well-architected, large open source codebases—like enterprise-level projects. I'm hoping to find examples that are beautifully structured, easy to read, and follow clean coding principles like modularity. Any recommendations?
3 Answers
You might want to check out Lichess! It’s mostly open source aside from their cheating detection features. It’s a great place to start if you're looking to see high-quality code architecture. Plus, there’s a cool video here that showcases it: [YouTube Link](https://www.youtube.com/watch?v=7VSVfQcaxFY&t=). You can explore their code on GitHub too: [Lichess GitHub](https://github.com/lichess-org).
Have you ever checked out the NetBSD source code? I found it a lot easier to navigate compared to the Linux kernel or GNU utilities. The original Doom source code was also quite enlightening in terms of its structure.
Thanks for the tip!
There's actually a book called *The Architecture of Open Source Applications*. It’s really insightful and lays out various architectural patterns used in open source projects. You can find it here: [AOSA Book](https://aosabook.org/en/).
Bro, this is perfect! Exactly the kind of answer I was hoping for.

Thank you, this is really interesting. It's awesome to see what an "average" programmer can accomplish.