Linux Applications Performance (ZeroHTTPd)
A series of articles exploring low-level Linux programming by creating a simple web server with a variety of architectures. By Shuveb Hussain.
Introduction to Networked Physics (2014)
A series of blog posts that look at networking a physics simulation three different ways: deterministic lockstep, snapshot interpolation and state synchronization.
Beej's Guide to Network Programming
A thorough introduction to network programming, primarily in Unix.