Spectacle

Spectacle is a simple utility that allows you to easily organize your windows without using a mouse. Those familiar with similar apps will find Spectacle to be a simple and unobtrusive way to become more productive while using your Mac. Using Spectacle you can view multiple documents side-by-side, move windows to other displays, or even focus your full attention to a single task. Note: While the software is classified as free, it is actually donationware. Please consider making a donation to help support development.