First off, hey! I stumbled across this site while searching for Fallout mod tools, and thought I'd drop a preview off, to see if anybody (besides me) would be interested in it. I'm making this mostly for personal use; but if there's interest, I can add a bit of polish to it after it's done :p
Currently it's mostly complete - with just a bug or two in the map object parsing, and needs to be tested with a larger selection of maps (been working with the Vault 15 entrance map, and Vault 13 so far). So maybe a week, two at the absolute max, before it's ready.
As for why I decided to do this? Well, it's a kind of long, and a bit silly of a story. Keep reading, if you care.

Well, it all began, once I decided to give the originals a try, after enjoying both FO3 and FONV. It was fun enough, except I kept running into trouble with navigating.
So the first step, was to try to find some maps - and while I found some pretty decent composites taken in game, these all showed the maps with roofs on, and (obviously) with the walls up.
So, then I figured, I'd create my own in-game composites. Well...yeah, that was going to take forever by going in and out of each building to get a layer without roofs.
So, then I decided to see if there was a map editor - and of course, there was - linked on this very site. Unfortunately, as I should've known, running late 90's Windows software on Windows 8 64-bit, has a good chance of failing miserably. And so it was with Mapper 2.
The next attempt was to get a VMWare image of Windows xp, and run Mapper 2 that way. That did work, except Mapper 2 was made with a fixed map window, set at 640x480. So, while a bit quicker, piecing together a full map, with three different view states, was going to take a while. Even after using an Autohotkey script to automatically scroll the map, and a custom app to capture the area and place it - it was still going to be a pain.
And that brings me to this project. Thanks to the Vault-Tec Mods wiki, I was able to read up on the necessary formats, to be able to create this. Of course, with the time that's taken so far, I could've probably achieved the same end goal with any of the previous attempts. But...this was a lot more fun. :p
I suppose, once I'm done, I should actually get back to finishing the game, and go on to FO2... /shrug