Sea3D is a free Windows version of the popular german board game, Settlers of Catan.

Settlers of Catan is a board game involving multiple people, who gather resources from the board, and built settlements and cities to score points.

Sea3D is implemented in OpenGL using 3D graphics and textures.  It comes with an accompanying website which allows for finding hosted games to join.

Sea3D fully supports all of the Settlers and Seafarers rules, and scenarios