A large number of wood carving patterns can be found on L. S. Irish's website http://www.carvingpatterns.com/
The tutorial Your First Carving Pattern is a good starting point for Relief Wood Carving, with the Low Relief Sailing Boat being good for those that have slightly more experience.
The website features a small number of free patterns, and also has over 1,500 patterns for sale.
Note that the wood carving patterns on this site, including the free patterns do have a copyright on them detailing what they may or may not be used for.
L. S. Irish has also published a number of books on wood carving that can be found here...
L. S. Irish's books on Amazon.com
L. S. Irish's books on Fishpond.co.nz
