Unlearning descriptive statistics, by Stijn Debrouwere.
Punched Card Typography – IBM 026, 029, 129, “I stumbled upon a rather interesting, astoundingly flexible, and quite arcane piece of technology: The IBM card punch code plate.”
Logarithms and exponentials of functions, by Dan Piponi.
Generics in Small Doses: Nanopass Compilation with Haskell (2008), by Adam T. Sampson and Neil C. C. Brown.
The BD Software C Compiler (BDS C), targetting 8080/Z80. Public domain.