UPDOWNtoday - UPDOWNTODAY allows you to check whether the website is down or not.
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.
IsThisSiteDown.org - Free tool to check whether a site is down just for you, or for everyone.
NetCrunch Tools - Our free network tools offer ping scanning, SNMP scanning, port and network service scanning, and more.
Is it Down? - Is it down can check if a website is down or is it just your PC that can not access it.
NetTK - NetTK, Network Tool Kit, is an Open Source alternative for monitoring and troubleshooting your...