Total Commander - A Shareware file manager for Windows® 95/98/ME/NT/2000/XP/Vista/7, and Windows® 3.1.
DisplayFusion - DisplayFusion will make your multi-monitor life much easier.
Double Commander - Double Commander is a cross-platform open source file manager with two panels side by side.
WindowGrid - Quickly and easily layout windows on a dynamic grid using just the mouse.
XYplorer - File Manager for Windows
Mizage Divvy - Divvy is an entirely new way of managing your workspace.