Map Rectifier is an online georeferencing tool. Take a map image, identify the coordinates of a half-dozen or so points, and the program will “warp” the map image to fit the projection on the right-hand side of the page — producing a GeoTIFF that can be imported into other applications. Fantom Planet, Slashgeo, Tanto.

See previous entries: Warping Waldseemüller; MapCruncher Update; MapCruncher.