Ultramon

UltraMon is a utility for multi-monitor systems, designed to increase productivity and unlock the full potential of multiple monitors.

Commercial Windows

Dual Monitor Tools

Dual Monitor Tools is a software package for Windows users with dual or multiple monitor setups. All the tools are open source and free, and each tools is independent so you only need to install or run what you want.

Free Open Source Windows

SwitchResX

SwitchResX is a tool designed to manage resolutions of all your monitors and HDTVs. This includes convenient methods for managing the contents of multiple desktops, for...

Commercial Mac OS X