A kickstand is a device on a bicycle that allows it to be kept upright without leaning against another object or the aid of a person. A kickstand is usually a piece of metal that flips down from the frame and makes contact with the ground. It is generally located in the middle of the bike or towards the rear.
A side stand style kickstand is a single leg that simply flips out to one side, usually the non-drive side, and the bike then leans against it.
A center stand kickstand is a pair of legs or a bracket that flips straight down and lifts the rear wheel off the ground when in use.
A flick stand is a small bracket that flips down from the down tube and engages the front tire to prevent the front end from steering and thus enabling the bike to be safely leaned against an object without danger of the front end turning and the bike subsequently falling to the ground.