Asmttpd – Web server for Linux written in amd64 assembly
It's been closer to 20 years since I last read a complete program in x86 assembly, so this is quite fun to look at.I'm somehow disappointed (quite unreasonably, of course) that the code uses plain old zero-terminated C strings instead of something more exotic. One of the fun things about assembly is that you get to reinvent basic language features on the fly -- calling conventions, data layout, strings, everything.