There's no shortage of password managers for OS X, but Lunabee's OneSafe, like the popular 1Password, sets itself apart with a smart feature set and impressive usability.
Flexibits's newest Mac app is Chatology, which attempts to improve on searching your Messages logs. Unfortunately, the app seems to have contracted some of Messages's own flakiness.
If you find yourself typing the same text strings over and over, navigating to the same file-locations, or running through the same menus, you need to try Keyboard Maestro.
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.
If you need to display and update data on a regular basis with a minimum of difficulty, it's unlikely that you'll find anything better at handling that task than Status Board.
If you find OS X's built-in capabilities for unarchiving and uncompressing files to be too limited, you'll want to check out Dag Agren's free The Unarchiver.
Lost Photos helps you find photos, received via email, that have gotten lost in your ever-growing archive of old messages.
Printopia Pro, an enterprise version of the popular OS X utility, aims to expand support for Apple's AirPrint to large and small organizations, all at less than the cost of a single new printer.
Is your cordless phone causing interference issues with your AirPort network? Change your phone rather than your AirPort settings.