Hooray for Standardbreds!
'Not sure if there is an equivalent as wide-spread as CANTER, but
in my area, we have the Standardbred Pleasure Horse Organization of New Hampshire.
One of the first farms I worked for had along with all their TBs an OTSB named George’s Bank. My employer then raced TBs, but he also had quite the collection of antique carriages and sleds – that’s where George came in. He was awesome! And huge! (And quite Roman nosed, but we loved him anyway.) 'Neat as a pin in his stall too: all poops in one pile.
I used to ride him to keep him in some semblance of fitness – he was very “lateral”, and tended to pace under saddle, but on the longe especially he had a beautiful trot (and a half-way decent ability to bend). Getting canter was tough; it was easier in an open field but he could get pretty strung out.
He was a little quirky and we had to use some caution when getting him ready to drive. For the first 20 seconds or so after we put on his harness, he had a tendency to charge forward. After that he was good to go, nice and steady. Strong though! One time my boss let me take the reins and holy smokes! I thought George was going to pull my arms off!