Development frameworks / SDK

Node.js     IoT.js    Device.js

Java and Eclipse IoT (Kura, SmartHome)

Particle    DeviceHive    openHAB

Communication Protocols

Wi-Fi          USB         Serial          IPv6          cellular 2/3/4G

Bluetooth   CoAP       MQTT          Z-Wave         ZigBee

EIB             XMPP       AMQP     HTTP/HTTPS    Sigfox      LoRaWAN

Hardware

Raspberry PI        Arduino        KNX          Crestron

сonsumer smart home hubs (Samsung, Philips, D-Link, etc.)

industrial gateways (Intel, Cisco and Eurotech) ESP32 (by Espressif)