The Blue Mule website has a pictorial record of some of the early figures in fantasy gaming. I’m showing my age, but I remember a lot of these figures from when I was in high school and college.
Dan Foley has a review and comparison of wargaming figures from several miniature manufacturers’ American War of Independence lines.
A work in progress, the Lost Minis Wiki is attempting to catalog as many of the sadly-out-of-print miniatures as possible. As with any Wiki, it’s only as good as it’s contributors, however, so add to it if you can.
Glorantha is a classic fantasy world created by Greg Stafford that is featured in role-playing games like RuneQuest and HeroQuest.
Greg Privat has created a website with pictures of wargames miniatures painted to represent various armies from the Gloranthan setting. Many of the models are conversions from ancients ranges, particularly Foundry and Gripping Beast; others are rare and obscure models, conversions and scratchbuilds.