Ultramon - UltraMon is a piece of software built to help with the management of multiple screens on the same computer system. Without software like this, taking full advantage of an expanded desktop space can be difficult.
DisplayFusion - DisplayFusion will make your multi-monitor life much easier.
EasyRes - EasyRes is a fast screen resolution switcher for Mac OS X with live animated previews.
Virtuoz - Virtuoz was designed to be a minimal and robust program that allows to have more than one desktop...
QuickRes - The best way to change resolutions on your Mac
VirtuaWin - VirtuaWin is a virtual desktop manager for the Windows operating system (Win9x/ME/NT/Win2K/XP/Win2003/Vista/Win7/Win10). A virtual desktop manager lets you organize applications over several virtual desktops (also called 'workspaces').