WifiKill is described as 'is the best wifi controller app for any Android device. It can disable internet connection or control over a device's network activity when the device is connected to the same network'. There are seven alternatives to WifiKill for Windows, Linux, Online / Web-based, Android and PyQt. The best alternative is NetCut, which is free. Other great apps like WifiKill are Netcut Defender (Free), TuxCut (Free, Open Source), Arpwatch (Free, Open Source) and elmoCut (Free, Open Source).
NetCut is a Software that helps you admin your network by purely on ARP protocol. List IP-MAC Table in secs, turn off & on network on any computer on your LAN including any device like router, switcher.
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Most users think NetCut is a great alternative to WifiKill.
arpwatch is a computer software tool for monitoring Address Resolution Protocol traffic on a computer network. It generates a log of observed pairing of IP addresses with MAC addresses along with a timestamp when the pairing appeared on the network.