Canon capture 1.0Free
Canon Capture is a tool for periodic image capturing with digital Canon cameras. It is licensed under GPL and it was developed for Linux.
The program is command-line oriented: the commands can be specified as command line parameters (useful for scripting) or can be entered in an interactive mode. It can take a shot, set various properties of the camera, open a viewfinder window (works like a webcam) and save viewfinder images.