Cisco IoT Cloud Connect - Cisco IoT offers a complete solution for mobile operators to provide exceptional IoT experiences.
FHEM - FHEM (TM) is a GPL'd perl server for house automation.
Antares.id - Reliable IoT Platform
pimatic - Home automation framework that runs on node.js.
ThingSpeak - Open source data platform for the Internet of Things. ThingSpeak Features
Homebridge.io - Homebridge is a lightweight NodeJS server you can run on your network that emulates the iOS HomeKit...