Lightbulbs
Philips Hue White and Color Ambiance A19 Starter Kit, 3rd Generation with Richer Colors
Philips Hue White A19 Starter Kit with two A19 LED light bulbs and bridge (hub)
Philips 460989 Hue White Ambiance Starter Kit (2 A19 Bulbs, 1 Bridge, and 1 Dimmer Switch)
Philips Hue White and Color Ambiance A19 Bulb Starter Kit 2nd Generation
Philips Hue LED Starter Kit
Philips Hue Bridge 2.0
Other Philips Hue As Long As you Have a 2nd Gen Philips Bridge
Lutron Caseta
Ivy Smarter Kit: Apple HomeKit Enabled Smart LED Lighting Kit
Incipio CommandKit Wireless Smart Light Bulb Adapter
iLuv Rainbow8 Smart Multicolor Lightbulb
Incipio Smart Wall Switch (coming Q2 2017)
Sylvania LEDVANCE Smart Multicolor A19 Lightbulb (coming early 2017)
Thermostats
ecobee 4 (coming soon)
ecobee3 Smarter Wi-Fi Thermostat with Remote Sensor, 2nd Generation
Ecobee3 Lite Thermostat
iDevices Thermostat
Lyric Round Wi-Fi Thermostat 2nd Generation
Honeywell Lyric T5 Wi-Fi Thermostat
Carrier Côr Thermostat HomeKit Enabled (announced for 2017)
Outlets
Elgato Eve Energy (NEW), Switch & Power Meter Bluetooth Low Energy
Elgato Eve Energy, Switch & Power Meter (old)
iHome iSP5 Wi-Fi SmartPlug
ConnectSense Smart Outlet
iDevices Switch
iDevices Outdoor Switch
Koogeek Wi-Fi Smart Plug for Apple HomeKit
INSTEON 2635-222 ON/OFF Module
Incipio CommandKit Wireless Smart Outlet Adapter
Incipio Wireless Smart Power Strip (coming q2 2017)
Leviton's Decora Smart Plug (coming April 2017)
Garage Door Openers
Chamberlain Smart Garage Hub (Expected by April 2017)
Chamberlain MyQ HomeBridge (Expected by April 2017)
LiftMaster MyQ (Expected by April 2017)
Sensors
Multi-Sensor
iHome iSS50 5-in-1 Smartmonitor Multi-Sensor (motion, temperature, light, sound and humidity)
ecobee3 Room Sensor (Motion & Temperature)
Temperature Sensors
Elgato Eve Room (NEW), Wireless Indoor Sensor
Elgato Eve Room (old)
Elgato Eve Weather
Onelink WiFi Environment Monitor
ecobee3 Room Sensor
Smoke Sensors
Onelink WiFi Environment Monitor
Onelink Wi-Fi Smoke + Carbon Monoxide
Netatmo Smart Smoke Alarm (coming soon)
Elgato Eve Door & Window Sensor
Fibaro Door/Window Contact Sensor
Motion Sensors
Philips Hue Motion Sensor
Fibaro Motion Sensor
Flood Sensors
Fibaro FGBHFS-001 Flood Sensor
Cameras
Ring Video Doorbell Pro (Homekit update coming soon)
Honeywell Lyric C1 Camera (Coming Q1 2017)
Honeywell Lyric C2 Camera (Coming Q1 2017)
Withings Home Plus (CANCELLED)
D-Link Omna 180 Cam HD
Fans
Hunter Fan Company Signal Ceiling Fan
Switches
Lutron Caseta
iDevices Switch
iDevices Instant Switch (control other Homekit iDevices) (announced for 2017)
Philips Hue Dimmer Switch
Leviton Decora Smart Switch
Locks
Schlage Sense Smart Deadbolt with Century
August Smart Lock HomeKit Enabled
August Smart Lock Mortise Kit (announced not available yet)
Smart Lock with Apple HomeKit
Schlage Sense Smart Deadbolt
Yale HomeKit Module (announced for 2017)
Other Hubs, Extenders & Adapters
Focalcrest Mixtile Hub (announced for 2017)
elgato Extended (Bluetooth Extender) (announced for 2017)
ConnectSense Bluetooth Extender (coming Spring 2017)
Irrigation
elgato Eve Aqua (announced for 2017)