Startupizer supercharges OS X's Login Items list by letting you determine the order in which login items load, as well as configure conditions that determine whether each item loads.
Bjango's iStat Menus 4 does a better job than the competition when it comes to showing you what's going on inside your Mac.
Eye-Friendly's keyboard shortcuts and multiple-display support make it a nice resolution switcher for Retina MacBooks.
Timebar's visual approach to timers repurposes your menu bar inoffensively.
Cordless Dog's Stay ensures your windows stay where you want them. It's a useful utility for Mac users who switch between multiple monitor configurations, such as MacBook owners who connect to an external display.
Retina MacBook Pro owners should have a screen resolution switching utility, and Pupil is one to consider. It’s convenient and pleasing to use, despite a few minor quirks.
If you frequently need to type special characters and symbols that aren't displayed on your keyboard, Characters makes it easy to do so from within any app.
If you use a variety of audio and video apps, you'll likely find Shush to be a nifty app. It gives you a systemwide mute control, making it quick and easy to mute your microphone, no matter which app you're currently using.
For accessing your most recent files, Trickster is a marked improvement over OS X’s built-in recent-item features.
In version 4, the venerable text-expansion utility TextExpander gains advanced fill-in features, better performance, and some fine tuning.