SelfishNet - Block anyone or any device from using your internet
inSSIDer - inSSIDer Essential makes it easy to maintain small business WiFi.
SoftPerfect WiFi Guard - Security of your Wi-Fi network for Windows, macOS and Linux
Wi-Fi Space - Hotspot location app
WirelessNetView - Small utility that runs in the background, and monitor the activity of wireless networks around you.
Lizard Systems WiFi Scanner - Lizard Systems WiFi Scanner is a multi purpose WiFi scanner and WiFi troubleshooting tool designed for dealing with all WiFi related issues conveniently.