Zcfan is a zero-configuration fan control daemon for ThinkPads.

Features: - Extremely small (~250 lines), simple, and easy to understand code - Sensible out of the box, configuration is optional (see "usage" below) - Strong focus on stopping the fan as soon as safe to do so, without inducing throttling - Automatic temperature- and time-based hysteresis: no bouncing between fan levels - Watchdog support - Minimal resource usage - No dependencies