And as I am not much involved in the development of the game anymore, but my contributions might be usefull for someone else, here they come. All these images are licenced under the Creative Commons Share Alike 2.5 licence.

Ships

These ships where modeled with Blender and then scaled with GIMP. I used drawings of similar ships that I could find on the net as inspiration.

Pinnace

Sloop

Barque

Cargo Fluyt

Merchantman

Frigate

Fast Galleon

Spanish Galleon

War Galleon

Tiles

These tiles are based on real public domain satelite images that I manually edited to create seamles interaction withanother. May be usefull for other types of game.

Clouds

Never realy finished these, but at least they work.

Hunt for Gold is a project that intends to make a game that is similar to Pirates! but open source and GPLed. I have contributed some graphics to this project.