Gary’s Combat Vehicle Reference Guide is what it says it is.
Gallery of Vehicles – Steampunk
Jim Stuht has a nice gallery of trains, planes and automobiles (and robots!) that he has constructed from various toys and models. It a fine source of inspiration for your VSF games.
Military Vehicle Camouflage
This page describes modern military vehicle camouflage schemes. There are dozens of links and a ton of information. Essential stuff for anyone painting modern military miniatures.
Military Vehicle Identification
I’ve painted a lot of 15mm and microarmor miniature wargaming vehicles in the last few years. Finding photos to help me in assembly and painting has always been a pain. This site is the cure. It has links to several dozen sites that detail WWII through modern military vehicles.