Kambo - Kambo is an all in one data-driven energy management system software that comes with the automated functions to minimize the power loss and making things to be done remotely.
FHEM - FHEM (TM) is a GPL'd perl server for house automation.
Crestron - Crestron is one of the leading innovative development platforms that provide you ultimate control and automation systems for the home, campus, or offices.
Conrad Connect - Service for managing smart home devices
Guardian Energy Management - Guardian Energy Management is a platform that benefits you with the energy-efficient software products and services to lower, contain, and control utility expenditures.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.