I believe there are commercial cherry pitters out there, but I recently read that you can use a soda straw to pit them Insert the straw in the top of the cherry and push down.
Diana Farmgirl Sister #272 St. Peters MO Country Girl trapped in the city!
They have little metal pitters that are really pretty cheap (under like $7) and REALLY help! I was gifted with alot of cherries one year and it made a huge difference. It would be in the kitchen gadget section of any hardware store.