extrace, extrace-openbsd — trace exec()
calls system-wide
extrace is really useful while inspecting or debugging a system. A small introduction I wrote is available on the advent of void blog.
lowdown — simple markdown translator
lr — list files, recursively
mksh — The MirBSD Korn Shell
nq — Unix command line queue utility
samurai — ninja-compatible build tool written in C
slant — remote system monitor
snooze — run a command at a particular time