Flow Studio by Wia - Where people and things go to talk
Home - Securely control all your HomeKit accessories from your favorite iOS device.
Particle Electron - Cellular IoT development board with a simple data plan
ioBroker - flexible and modular application for the IoT and Smarthome
Po.et - Reclaims value for content creators, publishers & consumers
Domoticz - Domoticz is a lightweight Home Automation System