Maptool for online RPGs and thus need art to make tokens to move about the map. I was therefore very happy to find a web site catering to the pulp magazines of the 50s, 60s, and 70s.
Men's Adventure Magazines is a blog dedicated to the "Sweat" pulp mags from the post war era. Not only does it contain numerous magazine covers, it is rife with plot ideas for your pulp games.
The blog does contain some scantily clad women which I'm sure were quite scandalous back in the day. Today they seem pretty tame but the site still boasts a "Mature Content" warning.
Check it out for all your pulp gaming needs.