TrekBuddy highly usable and small size of data On-Board-Navi, you need to load your route, maps and atlas by hand to your mobile

Chemist's Europe Atlas 1.0.3 (3 atlas files: terrain, map and both| magnification 3-16)

need to be tar'ed, not working if tar'ed etc.

Chemist's Europe Atlas 0.2.0

Chemist's D-CH-A-B-NL-SK Street Atlas 0.1.0

TrekBuddy (GPS and Map Tool for JAVA enabled mobilephones)

GMaps2.0 to TrekBuddy (online-converter for GMaps)

GMap2GPX (extractor for routes from GMap to GPX