* Insteon: Dual-mesh network, using both radio frequency signals and the home's existing electrical wiring to talk to each other. Every message is confirmed as it is received, and if any errors are detected, the message is automatically resent.
* Z-Wave: Wireless-mesh network. Confirms messages.
* X10 - Powerline transmission only, no message confirmation.
* PLCBUS Powerline transmission only, Every message is confirmed as it is received, and if any errors are detected, the message is automatically resent. Can be made compatible with X10, fairly cheap