Volumouse - Control PC volume with mouse

Volumouse is a FREE, quick and easy way to control the sound volume with your mouse wheel on the fly. It allows you to bind volume control to your mouse using all kinds of conditional rules for determining when the wheel will be used to control volume.

Some machines do not have a keyboard volume control which makes you have to find your "volume control" icon in the task bar, double click, then adjust. Not ideal. Also, some laptops make it difficult by making you hold down a FN key on one side and arrow keys on the other side... makes one hand, quick volume control tedious. Thanks NirSoft!

http://www.nirsoft.net/utils/volumouse.html