C Web Browser
I've been building a web browser in C from scratch, without any libraries and without AI. This is finally approaching a usable state: navigates and renders Wikipedia, supports TLS, builds on Windows, macOS and Linux, loads PNGs and JPEGs, etc. I'm going to opensource this once it supports most of CSS 2.2 layout and renders HN too (HN is totally blank right now, because it's a giant <table> which is still a TODO :-) ) I still don't know what to do with this. It's been a huge passion project and I'm very happy about it. I planned to create a book or video course about C programming, starting from printf("Hello world!\n") and ending up with a working browser; but the advent of AI coding agents in the past 2 years changed a lot the market for such a course. I'm still finishing this due to stubbornness and some sunken cost fallacy effect :-) Would love to hear feedback and ideas about such a project.