WizMouse - WizMouse makes your mouse wheel scroll the window under the mouse even if it's not active. You no longer have to click a window to scroll it.
DisplayFusion - DisplayFusion will make your multi-monitor life much easier.
Key Manager - ATNSOFT Key Manager, Key Remapper, Text Paster
Mizage Divvy - Divvy is an entirely new way of managing your workspace.
X-Mouse Button Control - XMouse Button Control (XMBC) allows you to create application and window specific profiles.
WindowGrid - Quickly and easily layout windows on a dynamic grid using just the mouse.