Byzanz is a simple tool to record a running X desktop to an animation suitable for presentation in a web browser. It's design has been guided by the following principles: - PURPOSE Byzanz records animations for presentation in a web browser. If something doesn't fit this goal, it should not be part of Byzanz. - CORRECTNESS When Byzanz provides a feature, it does this correctly. In particular, it does not crash or corrupt data. - SIMPLICITY The user interface and programming code are simple and easy to understand and don't contain any unecessary features. Byzanz does not attempt to do be smarter than you are. - UNOBTRUSIVENESS Byzanz does not interfere with the task you are recording, neither by keeping a large settings window around nor by consuming all your CPU during a recording. Byzanz is implemented as a GNOME applet. A command line tool for testing purposes is available, too.