Kawasaki
Kawasaki can be credited for creating one of the first UTVs with the Kawasaki Mule series. The Kawasaki Mule is the standard bearer for work oriented UTVs. Just because the Mule is all business doesn't mean you can't add accessories to it. There are plenty of Kawasaki of Mule Accessories to get your machine just the way you want it.
In addition to the Mule, Kawasaki has a sportier, yet still practical, Teryx. The Teryx, along with the Yamaha Rhino and Polaris RZR, was one of the first UTVs that people really started taking out for sport. As the Teryx started to cement itself as a recreational vehicle the amount of customization and accessories increased dramatically.