Comic Book Plus has a nice selection of classic pulp Crime Comics and stories.
Pulp
Gallery of Pulp Magazine Covers
For pulp gaming inspiration, here’s a gallery of pulp magazine covers.
Atomic Comics and Stories
Comic Book Plus has a collection of “Atomic Comics” from the late 1940s through the 1950s that attempted to capitalize on the public’s fascination with atomic energy.
Pulp Pirate Comics and Stories
Comic Book Plus has a collection of pulp pirate comics and stories.