1)   Advanced IP Address Calculator 1.1
It is a freeware Windows 95/98/NT/2000/XP utility that lets you to calculate every aspect of your subnet configuration in a few mouse clicks! It was designed for any network engineer who needs a fast way to determine subnets.
Supernet, IP calculator, Subnet calculator, CIDR, Subnet, host, Network type, host address range,

 2)   Advanced Subnet Calculator 9.1
Free Subnet Calculator tool from SolarWinds generates all subnets with real-time DNS, PING and CIDR tests. This application provides address details, a classful subnet creator, a CIDR calculator and subnet address lists that can be exported.
Free, Subnet, Calculator, CIDR, IP, Address, Managment, PING, subnet calculator, DNS,