Why use stock icons instead of standard Domino images?
Icons deliver the first impression when someone experiences your application or visits your website. Adding stock icons can be the difference between giving an impression of merely functional, or looking professional.
Designing professional-quality icons ranges from time-consuming (if you're artistic) to virtually impossible (if you’re not artistic - witness the shopping cart on the left).
For a fraction of the cost of having a graphics design professional on staff, the solution is to acquire a set of stock icons. A stock icon collection typically contains 100 or more icons that represents the functionality common to most applications and websites (help, copy, paste, shopping carts, flags, locks).
Here is a review and list of many web sites offering free and commercial icons: