Advanced IP Scanner is a fast, robust and easy-to-use free IP scanner for Windows. It can find all the computers on your network and provide easy access to their various resources ...

Then give this small, free, simple-to-use utility a try. Advanced IP Scanner v1.5 performs a lightning-fast scan of all IP addresses on your network, or of all devices in an IP range you specify.

Devices with static IPs can coexist peacefully on a network where DHCP is present, as long as the DHCP server doesn't try to hand out the same address you are manually assigning.