I have used X10 modules on assorted lights and devices for home automation for several years, and although the remote control facet has always worked well, tying the system into my Linux boxes has never been easy. Numerous small, typically one-person X10 controller projects have come and gone. But one application has survived: Heyu. It runs on desktop Linux machines without requiring the overhead of a Web or database server, and it enables direct X10 control, event scheduling, and more.