As I'm writing a web server as well (just for hobby, won't be big and professional like nginx), I did glance at Nxweb's code a few months ago. It's pretty hard to grasp, and I consider myself to be a pretty experienced C programmer. Hard to grasp code usually raises some red flags, security wise. It does perform well, though, and has some pretty interesting ideas. It is well worth looking, even if for learning a thing or two.

The Reddit thread for Nope.c is generating a lot of constructive criticism. It ranges from stylistic issues to security issues to architectures issues. Nope's author might learn a lot of stuff and have a lot of fun -- I sure did when writing my own.

(In time, my project's web page is at http://lwan.ws)

Clickable: https://bitbucket.org/yarosla/nxweb/wiki/Home

Duda is also a good alternative: http://duda.io/

There is also https://kore.io/.