ChessClock is a software chess clock. It also can be used together with a digital camera or webcam to take a picture of the board after each move so that positions encountered during the game can be revisited.

You might also be interested in using a webcam for time lapse, security, making 3d models, tracking and/or long exposure. Applications relating to education include plagiarism software.

Requirements: A computer, an image capture device such as a digital camera or webcam (ChessClock can automatically detect and work with most image capture devices).

An online chess timer