LinuxMCE is an add-on to Kubuntu that provides a complete whole-house media solution. It provides PVR and distributed media functions. It is stable, easy to use, and requires no knowledge of Linux and only basic computer skills. It allows you to set up a computer system that centralizes audio/video equipment, allowing you to access all media functions in other rooms with only thin clients. It supports home automation protocols including KNX, EIB, Z-Wave, DMX, EnOcean, and PLCBUS.
OpenNetHome is a home automation software project with a focus on being able to mix different technologies. It currently supports a number of different RF transceivers for controlling remote switches and receiving temperature and moisture data. It also supports Philips Hue lights. Its user interface is Web based, but all features are also accessible via a TCP/IP interface. It supports plugins for new features but also for new protocol encoders/decoders. Also included is a signal analyzer tool for reverse engineering new RF protocols.
gnhast is a collection of daemons that work together to build an event-based home automation system. Any event (such as a light being turned on) can be handled by an external script or program. These programs can be written in any language, and the central daemon handles all the intercommunication. It is designed to be easily extensible for new device types and protocols.