longboard
A longboard is a longer and wider variant of a skateboard. It is commonly used for cruising, downhill racing, slalom racing, sliding, and/or for transportation. Longboards and skateboards generally use the same parts and have the same construction; however, the parts generally have different dimesions. Longboards use larger and harder wheels than skateboards do, this is why they are used for downhill racing. Riding a longboard feels much different than riding a skateboard.
snakeboard
A snakeboard is a board that was invented in 1989 by James Fisher and Oliver Macleod Smith. It evolved from the original skateboard, and brought with it elements of snowboards and surfboards. The original version was built on a square wooden boards, with an old roller skate and a piece of plumbing pipe. Many variants were built before manufacturing trucks from plastic. Wheels are attached to the footplates through a form of a truck.
Swing board
There is no definitive origin or inventor of the of swing boarding. One proposed origin is that it most likely arose in the 1970's by bored teenagers with skateboards sitting around in playgrounds with swing sets. The original activity is primitive and temporary as it involved placing a skateboard including wheels on the swing and the rider swinging back and forth holding onto the two side chains. This activity usually ended in an accident with the skateboard falling off the swing followed closely by the rider. The swing board was eventually turned into an fitness exercise. Different variations of the swing board are the board swing and ropeboarding.