 Tucker Sno-Cat is currently one of the most successful snowcat manufacturers in the world today and still producing machines.Thiokol was another American made contemporary of Kristi that focused on small snowcats, notably the Imp, Super Imp and Spryte models.Like the Kristi KT4a amphibious model, Thiokol manufactured an amphibious version of the Spryte, called the Swamp Spryte.