Freedomotic is an open, flexible, scalable, mashup-oriented software system which can interact with well-known standard building automation protocols and with "do-it-yourself" solutions. It treats the Web, social networks, and frontends just like any other sensor or actuator in your automation system. For example, you can tweet your washing machine to start the washing cycle. Freedomotic leverages modern enterprise integration patterns and distributed computing architectures, along with cross-language APIs for extensions.
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.
nad_daemon is a daemon used to remote control NAD amplifiers over RS232. It will accept commands from the network and send them to the amplifier. It also includes a simple client. It has only been tested on the C355bee, but it should work with other amplifiers. Certain receivers from NAD will also be remote controllable in this fashion, but the more fancy features are not yet implemented.
MoCo is a system that monitors and controls SCADA points, such as temperature, HVAC, power, lighting, sprinkler systems, and more. It has industrial capabilities, but is scalable from very small home systems to enterprise, world-wide ones. It works with inexpensive I/O bridges (including X10, Insteon, and 1-wire) from a number of manufacturers. It has sophisticated history logging and diverse control capabilities, as well as a 117-page implementation manual.
WOSH (Wide Open Smart Home) is a message-oriented middleware for controlling and automating a smart home. It comes with working services and devices. WOSH is an open multi-platform C++ framework. Its architecture is service (bundles) oriented and designed for distributed (cloud) computing. WOSH ships with library source, many services, and some applications (a server, a trayicon remote controller, and a GUI full-controller). Some features provided by its micro-kernel are a multi-user system with access policies, a centralized database manager and system monitor, and automatic network management and masquerading (on TCP). Some of the implemented services are: multimedia audio playback, monitor and control of X10 devices, remote control using instant messaging, and a remote control using SMS and call notification.
WIRN is a professional stored program control. It is optimized for heat control, but you can control whatever you want. It is a multitasking system using FreeRTOS.org on Atmel AT32UC3A1512, and has an API for simple sensor/actor interaction that makes it modular and simple to extend. Also included is a triac control over AVR ATtiny2313 and a 1Wire Interface. You can extend it via software: implement your own control loop with some lines of C code. You don't need a compiler; upload your code and get a binary back. Flash this binary over USB and go. It also has 3 ports to plug in your own hardware.