http://www.vmware.com/vmtn/appliances/directory/634
"Ipanto Lite is a powerful tool which:
Administers all your subnets and locations within a single repository,
Offers reporting, Gives access to other IT staff members in read-only mode, Web GUI and SQL database.
Replace your spreadsheet: Ipanto Lite will help you to list and manage all the subnets and IP addresses of your company thanks to its single
repository."