IPAM, but for management interfaces

we currently have an excel spreadsheet full of management addresses for switches/routers/access points etc and i'm looking for alternatives as we cross the ~400 device barrier, we're also acquiring new companies like mad so we're getting more & more sites & devices on our network at a rapid pace and the excel file is becoming a little strained.

has anyone got any good solutions, pointers, recommendations or horror stories? would you just stick with a spreadsheet or are there legitimate solutions out there which can help with this? (like some kind of open source web interface thing that will automatically make clicky links for web interfaces?)

i started moving everything to a confluence document on friday but it just feels a bit clunky and i'm hitting that age old barrier of "how much info is too much info"

how do you folks do it? have you seen something that makes you go "that looks neat!" or even "this is the worst thing in the world, the network admin should be shot."

thanks!