HotMouse 

HotMouse allows you to scroll windows with the mouse wheel without having to click on them first. You can even specify the number of lines to scroll for a specific window.
mouse wheel scrolling without clicking first microsoft word excel powerpoint

XDESK 

Powerful & stable Virtual Desktop Manager / Assistant - features QuickView, AppBar, powerful rules, Reminders & Alarms, CPU meter, Applications AutoRestart, Memory Cleaner, TaskList, HotKeys, HotMouse, Mouse-Scrolling, HotCorners and more !
virtual desktop managers tools - shell extensions