NetCut - NetCut is a Software that helps you admin your network by purely on ARP protocol.
Multiping - Get MultiPing Support. Network monitoring in 60 seconds. MultiPing provides a graphical view of network performance, monitors hundreds of targets, and sends automatic alerts..
SelfishNet - Block anyone or any device from using your internet
Ping Meter Gadget - Customizable, graphical, semi-transparent ping (latency) meter.
CSArp-Netcut - An arpspoofing program that lets users launch spoofed arp requests to disrupt connections in a LAN
Fping (open source) - fping is a program to send ICMP echo probes to network hosts, similar to ping, but much better performing when pinging multiple hosts.