Do mean an engraving on the front to make it pretty, or modifications to the tabs to make them something other than rectangular?
For the former - yes, a search on the forum for https://community.glowforge.com/search?q=free%20patterns will get you quite a few - out on the web even more
For the latter - yes, this post: Variations of finger joints has a whole conversation to get you started 
Have fun!