Routable OSM Roadmap of Costa Rica by Ben Konrath
OSM maps of Eritrea focusing on Error detection
Routable OSM map of Belarus by Team OID
Routable map of Armenia based on OSM data by Lambertus
Topographic maps of the Azores
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.