netcat - Netcat is a featured networking utility which reads and writes data across network connections...
SelfishNet - Block anyone or any device from using your internet
PortMapper - Do you need to map a specific TCP or UDP port on your machine to another port on another machine?
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.
Komodia Relay - Free open source tool to perform TCP based session relay
SoftPerfect WiFi Guard - Security of your Wi-Fi network for Windows, macOS and Linux