Tiki Navigator, worth a look see
It’s worth checking out this screen shot in all its colorful pixels. Tiki Navigator is slowly gaining a devoted following, largely for its clean and attractive interface. I made this screen show some interesting options like the context sensitive help windows and the function key map, but they disappear completely if you want them to. Tiki only shows raster charts, but otherwise seems to have a lot of features, depending on the version you choose, all reasonably priced.