You can also try and have a hands on GearTrax.
GearTrax=99 provides the designer with an easy to use tool for creating
solid models of drive components. Create spur, helical, straight bevel
and involute splines with true involute tooth profiles.
* Intuitively easy to use for the designer with limited gear
Powerful enough for the gear expert.
* Animation window shows the spur/helical gear mesh which updates
as the data is changed.
GearTrax is an add-in for SolidWorks, Solid Edge and AutoDesk
You can get a 10 days trail version of the same. Find more about