One sign of a useful utility is that you don't notice you're using it, but you do notice it's excruciating to use a different Mac without it. That captures how I feel about OnMyCommand. The download comes with the extremely useful OMCEdit application to get you started. I keep these commands and a few others at my fingertips: Open Terminal Here, Copy Path to Clipboard, View Metadata, Change webloc file to url, and Make <img> tags. Open Terminal Here closes the loop between CLI and GUI for OS X. From Terminal, you can type open . to open the current directory as a Finder winder. Well, with a right click on the window's background, Open Terminal Here will launch a new Terminal window and change to that window's directory. It makes the Unix experience of OS X seamless. Copy Path to Clipboard not only copies the path of the current file, but also properly escapes certain characters for you. Easy! You can find these commands and more here.