Isolator helps you focus on the current application.
HazeOver automatically fades everything but the active window, letting you better focus on the task at hand.
Capster, a Growl plug-in, notifies you of unintentional caps-lock presses.
CmdVees doesn't have nearly as many features as the more-advanced multiple-clipboard utilities out there, but for its more-focused goal of letting you store and quickly paste multiple recent snippets of text sequentially, it's in some ways more appealing.
One of the Mac's most touted power user utilities is experiencing another revival, thanks to a new team of developers.
Moom is a nifty utility that repurposes OS X's little green "zoom" button to let you quickly resize and reposition windows. As long as its preset window arrangements are enough for you, Moom is mighty appealing.
Four years in the making, Skitch 1.0 is a unique, easy to use, and well-connected screenshot- and photo-sharing app and Web service available for the Mac.
Caffeine is a simple program that keeps your Mac from dozing off when you're not using the cursor or keyboard.
How Find Any File helped me solve a cosmetic Backblaze bug.
QuickCursor lets you use your favorite text editor "within" any other program.