Web based IP Address Management software. There are a few out there, most of them dead. Some are add-ons to bigger projects (NOC Project, Infoblox,) or doesn't work like I want (GestióIP), or cost too much for us (Solarwinds). DB backed with auto-discovery and a useable web interface. I use NOC, but most of it is wasted since I don't use any of it. Mostly just the IPAM stuff.