esp32 - A very cheap small chip, compatible with Arduino.
ioBroker - flexible and modular application for the IoT and Smarthome
Intel NUC - Intel NUCs are available as Kits(Barebones), Boards(Mainbaord only) and as perconfigured Mini-PCs.
Domoticz - Domoticz is a lightweight Home Automation System
SanCloud BeagleBone Enhanced WiFi 1G - One amongst SanCloud's range of BeagleBone Enhanced SBCs - each are enhancements of the BeagleBone Black (BBB).
Home - Securely control all your HomeKit accessories from your favorite iOS device.