Aside from the little stuff like cranes, I can make a couple of cool dinosaurs ( a t-rex and a brontosaurus) and a kangaroo. Amuses little children and waitstaff who I leave folded-up chopstick wrappers and the like for.
Thanks to Curious George Rides a Bike I can do a hat, which can then be turned into a boat that actually floats.
I can also do one of those things from grade school where you choose a color, then a number, then you open the flap and it says “You’re a dork” or something.
Yes, I am aware that none of my examples are considered origami. 
I know the crane by heart. I can never make him move around though. I once tried to do 1000, but gave up around 100 something.
I can turn a piece of printer paper into a nice origami version of an aerogramme envelope (write on inside, fold up, tape shut with 3 pieces of tape, address and stamp). If you use construction paper, you can also use it as a cover sheet for a real letter.
I can also make paper bombs/teakettles (they’re based on the same base model).
Uhm. And a whole bunch of others – I had an origami hobby when I was a kid. But several of my origami books have since disappeared off the face of the earth. 
I can do the hat and the boat too, and for another non-origami trick, I can fold a perfect pentagon.
On the other hand, I’ve followed the instructions for a few real origami figures, and they never look as pretty as the ones in the pictures.
Balloon, crane (flapping and non-flapping), frog (not jumping; blow-up), lily.
I used to be able to do this really cool gorilla, but I forgot how, and it’s not in any of my books.