“Just a list of 20 (now 24) little-known tools for the command line — I hope you find something useful that you weren't aware of yet! Use your operating system's package manager to install most of them.”

"Despite his initial reaction, he decided to dig deeper into this case, and he uncovered a bug that had been sitting in the code of all BSDs (including Mac OS X), including a lot of old releases. He confirmed the bug was already in 4.2BSD, released in Aug

"The MacPorts Project is an open-source community initiative to design an easy-to-use system for compiling, installing, and upgrading either command-line, X11 or Aqua based open-source software on the Mac OS X operating system."

Like it says, a shell script to automatically install the perfect Ruby on Rails development environment on OS X. Useful!

A great cheatsheet.