I think someone above mentioned the Zebco Omega. I don't have one, but have fished with a guy that uses them for crappie. He's one of the best single pole crappie fishermen I've ever been in the boat with. He has caught 1000's upon 1000's of crappie on those Omegas. He uses them for shooting docks too. He doesn't bend the pole and slingshot it, he just casts low like you would while bass fishing. He can get the jigs further under the dock with his method than I can slingshotting them.

If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then will I hear from heaven and will forgive their sin and will heal their land. 2 Chronicles 7:14