Large-scale cluster management at Google with Borg, by Abhishek Verma, Luis Pedrosa, Madhukar R. Korupolu, David Oppenheimer, Eric Tune, and John Wilkes. “We present a summary of the Borg system architecture and features, important design decisions, a quantitative analysis of some of its policy decisions, and a qualitative examination of lessons learned from a decade of operational experience with it.”

Pre-Pooping Your Pants With Rust, by Alexis Beingessner.

Hevea Project, an implementation of the Convex Integration Theory in order to visualize isometric embeddings of flat tori in three-dimensional Euclidean space.

Calculate categorically! (PDF, 1991), by Maarten M. Fokkinga. Quite nice notation, perhaps useful where diagrams are not appropriate. (Also see A Gentle Introduction to Category Theory: the calculational approach.)

Fairfax, a nice 6x12 pixel font with huge range of characters.