Time Out - Break timer with micro-breaks for Mac OS X.
SwitchResX - SwitchResX is a tool designed to manage resolutions of all your monitors and HDTVs.
Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
EasyRes - EasyRes is a fast screen resolution switcher for Mac OS X with live animated previews.
StretchMinder - Work break timer with guided movement & breathing exercises
Resolutionator - Resolutionator makes it simple to use any of your display's available resolutions.