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openHAB is a Java-based open-source home automation platform that integrates and combines a vast range of different smart home systems and technologies into one single solution.On top of the unified abstraction layer all connected devices are available for the overarching automation rule engines and different user interfaces.

Home Assistant is an open-source home automation platform running on Python 3. Track and control all devices at home and automate control. Installation in less than a minute.

Domoticz is a home automation system that lets you monitor and configure various devices like lights, switches, various sensors/meters like temperature, rain, wind, UV, electricity, gas, water and much more. Notifications/alerts can be sent to any mobile device.

HomeGenie, Home Automaton Server in the Internet Of Things era

Jeedom is a complete home-automation software. With Jeedom, you can do many things, such as :- Manage the safety of goods and people,- Automate heating for better comfort and energy savings,- View and manage energy use to anticipate expenses and reduce use,- Communicate by voice, SMS, e-mail or mobile applications,- Manage all of the home’s automatic devices: shutters, gate, lights, etc...- Manage multimedia audio and video devices, and connected objects.- Runs on Raspberry PI and various alternative boards. »

ioBroker is an integration platform for the Internet of Things, focused on Building Automation, Smart Metering, Ambient Assisted Living, Process Automation, Visualization and Data Logging. It aims to be a possible replacement or extension for software like f.e. fhem, OpenHAB or the thing system by the end of 2015. ioBroker is the successor of CCU.IO, a project quite popular in the german HomeMatic community.

A small GUI for accessing Philips HUE Lamps under any Windows environment.

Domogik is a free (GPLv3) Home Automation solution.

Stringify is an award-winning IoT (Internet of Things) platform that lets you easily create powerful Flows to automate your home, wearable devices and network services. Easily create and add powerful Flows that automate your work and life.

DomotiGa is Open Source Home Automation Software from the Netherlands. It is written in Gambas Basic and runs on Linux.

Freedomotic is an open source, flexible, secure Internet of Things (IoT) development framework, useful to build and manage modern smart spaces.

mediola® IQONTROL is the ultimate and easy to use Smart Home App for consumers to control & automate their homes using our powerfull mediola® a.i.o. gateway which supports and unifies many brands and devices.

MisterHouse is an open source home automation program. It's fun, it's free, and it's entirely geeky. Written in Perl, it fires events based on time, web, socket, voice, and serial data. It currently runs on Windows 95/98/NT/2k/XP and on most Unix based platforms, including Linux and Mac OSX.