Cloudmade's OSM maps of Yemen for OSM improvement
Very nice and completely routable maps based on OSM data by Lambertus
Marine Maps of Argentina
OSM Error Edition mapset of Chad by Cloudmade
Standard OSM map of Morocco by Computerteddy
This is a collection of nice topographic maps from Afghanistan. They feature roads, rivers, settlements, POIs and contour lines. They also provide english transliteration of the names.