Chess Clock is game clock software for chess players with N900. Software supports different time controls (time additions, delays, hour glass). Timers are adjustable, different time settings for white and black are available.

Chess clock is available in extras-devel repository. The latest version is  1.1.2.

There is also an experimental version for the N800/N810 devices with Maemo 4.1. All features are not supported on this version.