Gourd Chip Carving Gouges are made by several manufacturers for wood carving. The most commonly used gouge is a 1/4 U. Warning - all 1/4 U gouges are not the same size!
The best gouges that I've used are made by Flexcut, Drake, and Ramelson. They are made from high grade steel and hold the cutting edge. You can buy other gouges for less money, but those less expensive gouges will not perform as well. The gouges come with two types of handles (palm and straight).