Hey! Well, there are tonnes of bits, but there are variations of some of them. Like there are
snaffle bits, and you'll get into the
"D" rings, loose rings and eggbutts. From there you can have a
mullen mouth type of bar, which is just a straight bar, that can have either loose ring, D ring or eggbutt rings. There is
broken bars, which simply have a break in the center (They kind of look like they "fold"). There are
French Links which have two breaks in them. There are the
Full Cheek and
half cheek snaffle. The Full Cheek has a long spike-ish type thing on the top and bottom of the ring. The Half cheek has only the bottom part.
There are
pelhams which are something complicated to explain. They usually have a rubber straight bar and they have three rings on either side.
The
Liverpool is mainly a driving bit, and that is quite complicated as well. There is a round section like an "O" at the top. A long type of thing goes through the center that is shaped like a line "|". The shank has hole sin it, about three.
A
Kimberwick is a very popular bit. It looks like a large "D" ring, but it has slots on the sides to get more or less leverage.
Curb bits are used in dressages' double bridles. it has lots of little rings on the sides, and is for flexion in the body. It looks a little like a pelham.
Tom Thumbs are used in western, and are unique in them selves. they have a short shank, and are mostly like a shanked snaffle.
There is an
English Elevator, which is a gag bit of sorts. it has a large ring and a twisty type shank.
A
Tennessee Walking Horse Bit is for Tennessee Walkers mainly. They have up to 12 inch shanks (yes, I do mean 12), and they have a small part at the top where the bar sits. It can have mullen mouth, broken, double broken, rollers and things like that.
Hope this helps a LITTLE. I know I haven't covered a LOT of them, but other people can sure get some stuff in here too.