Robonanny

RoboNanny is a computer home security and baby monitor software. It monitors sound level in your room via your computer microphone, broadcasts audio from the microphone over the network, and records surrounding audio, and fires sound alarms. While connected to the Internet (even a 28.8 modem will do, but DSL or Cable is certainly better), RoboNanny can continuously broadcast your room's sounds. Use Windows Media Player to listen to your home.