SysAdminGear

Wackamole is a good software that helps you to make a cluster highly available.

Wackamole runs a service using multiple DNS RR records without the worry of one of the machines crashing.

Wackamole Description:
If the machine crashes, the virtual IP addresses it was responsible for will be managed by the remaining machines in the cluster. Wackamole works in a completely peer-to-peer mode within the cluster.

Download Wackamole

Wackamolem Website