MisterHouse home automation
"MisterHouse is an open source home automation program. It's fun, it's free, and it's entirely geeky. Written in Perl, it fires events based on time, web, socket, voice, and serial data. It currently runs on Windows 95/98/NT/2k/XP and on most Unix based platforms, including Linux and Mac OSX. It can talk, it can check your messages, control the lights, program your VCR, and what is best - it understands spoken commands. It can even track your car by interfacing to a TNC. And there are 600 users and 209 authors contributing to this project. Cool, eh?"