HRC – Hotkey Resolution Changer - If you are looking for a sumptuous desktop application that will overcome every bit of your need to adjust the brightness, resolution, and color contrast of your screen, then Hotkey Resolution Changer can be a smart option for you.
EasyRes - EasyRes is a fast screen resolution switcher for Mac OS X with live animated previews.
Display Resolution Manager - Display Resolution Manager is an easy-to-use software that is providing a straightforward way to play around with your screen resolution and color settings.
SwitchResX - SwitchResX is a tool designed to manage resolutions of all your monitors and HDTVs.
QuickRes - The best way to change resolutions on your Mac
XP QuickRes - XP QuickRes is a lightweight utility, providing you complete control in adjusting your screen color scheme and resolution without any errors.