Niko HUE Battery Free Dimmer Switch - Smartscape Connected Lighting Systems
Niko: Kinetic Energy Smart Switch User Review - MoreHue.com
Perpetuum: Signify - Philips Hue now works with third party light switches
They're here! : new Green Energy Battery-free Wall switches for Hue Bridge (Illumra, Busch-Jaeger, etc) - Devices & Integrations - SmartThings Community
Niko: Kinetic Energy Smart Switch User Review - MoreHue.com
Modular Lighting - MossTechnical
Wireless solutions
Installed new Friends of Hue switch from Niko. Confirmed working with Homekit app! : r/HomeKit
Philips Lighting expands into smart switches through its Friends | Philips Lighting