SelfishNet - Block anyone or any device from using your internet
Wifi Router Manager - Wifi Router Manager is a free-to-use network tool application that is providing the complete visibility of your wifi network from signal strength, security to IP addresses.
SoftPerfect WiFi Guard - Security of your Wi-Fi network for Windows, macOS and Linux
WiFiKiLL PRO - WiFiKiLL PRO app lets you completely shut down your internet connection and disconnect all the connected devices with a single tap.
Wifi Protector - Wifi Protector is an all-in-one application that provides a secure wireless connection with the help of a VPN, which means you are going to have a direct and encrypted connection between the internet and computer.
WirelessNetView - Small utility that runs in the background, and monitor the activity of wireless networks around you.