Pirates are my next big project, so I was happy to find that Cianty’s Tabletop Wargames Blog has an article on sources for pirate ships for gaming.
18th Century
Polish Uniforms 1633 – 1797
The New York Public Library’s Digital Collection has plates of Polish uniforms from 1633 to 1787.
Austrian Uniforms 1448 – 1896
The New York Public Library’s Digital Gallery has a large collection of prints of Austrian uniforms from 1448 – 1896. It’s an incredible painting guide.
Napoleonic Uniform Glossary
Newcomers to wargaming the Napoleonic Wars can be bewildered by the uniform terminology. That’s where the Napoleonic Uniform Glossary comes in handy. This site has photos of various uniforms and identifies the parts.
Pirate Figures Comparison
Frothers United, UK has this page which compares various lines of miniature wargaming pirate figures.