Shelly-1-x2 - The smallest Wi-Fi-operated relay switch.

Shelly 1 - WiFi AC/DC Relay Switch 15A — ameriDroid

Shelly Plus 1 - Relay Switch 12V/24V-60V DC / 240VAC WiFi 16A - Android / iOS Botland - Robotic Shop

OPEN SOURCE - Use the power of Mongoose OS to make your own application. Make your Arduino project live and usable in your automation project. Also,

Shelly 1 Relay Switch, WiFi Smart Home Automation, Compatible with Alexa & Google Home, iOS Android App, No Hub Required, Wireless Light Switch, DIY

Shelly Plus 2PM - 2-channel Switch/Roller Shutter - Android/iOS application Botland - Robotic Shop

Shelly 1 Relay Switch, WiFi Smart Home Automation, Compatible with Alexa & Google Home, iOS Android App, No Hub Required, Wireless Light Switch, DIY Remote Control Garage Door, UL Certified: : Tools

Shelly Plus 1 Mini switch - WiFi/BT module

Shelly Plus 1 Mini switch - WiFi/BT module

Tuya/eWelink 2 Way WiFi Switch - a bitter switch with a sweet ending - NotEnoughTech

Shelly 1 Open Source - a relay switch with WiFi - Kamami on-line store

Shelly RGBW2, WiFi Smart Remote Control for RGBW Led Strips, Home Automation