I am aware of just the two, Glove it and Coat it. They are both two part epoxies. I removed the layers of Glove it that the previous owner of my boat had put on because it was really chipping off and I didn't want to lose my new layer. I then layed down a coat of Coat it. I am really impressed with it because it has graphite (unlike glove it) and seems to slide right over the skinny spots on the river when before it used to stick to rocks like it had a bottom of glue.It still is holding up after two seasons of fishing.
I looked around for different product and investigated the idea of having truck bed liner sprayed on but this seemed expensive and is actually designed to be "non slip" so it would not work well in my opinion as the primary purpose of coating the bottom is to make it slick. (I may be wrong.)
Either way be careful as this stuff is toxic. Even when it is dry and you are sanding it you should wear a mask and clean any clothing immediately after you are done.