I wrote a DOOM clone in my own programming language
Raycasting DOOM clone built to stress-test a custom language's C-interop.

Rust book ending with a Redis clone instead of the usual todo apps.
Backend developers and systems programmers learning Rust
The Rust Programming Language · CodeCrafters · Build Your Own Redis
Raycasting DOOM clone built to stress-test a custom language's C-interop.
Paid book about DSPy when Stanford's own docs and tutorials already exist for free.
Upstash-compatible Redis on Cloudflare's free tier with 5GB storage.
Jepsen verification and Raft clustering on a Redis wire-compatible Rust database.
Proof-of-concept flight sim for the author's own Spectre language.
Valuable content, but Show HN is for shipped code, not books.