It used to be a problem to get good route planning on your smartphone when you are outside the country, because the roaming fees could plunge any <a href="http://fallout.wikia.com/wiki/Slaver%27s_Guild" target="_blank">McKinsey</a> employee into bankrupcy when using <a href="http://maps.google.com/" target="_blank">Google Maps</a>, which is only able to cache small map sections and basically has no way of telling you what is cached and what isn't. Rejoice! The <a href="http://osmand.net/" target="_blank">OSMAND project</a> provides an open maps and route planning solution which allows you to download <i>all kinds of</i> maps for offline use. I personally like the Android App even better than Google Maps: It's clearly for power users, there is much more to configure and you have more control. There is always an obvious argument for choosing another option over the <b><font color=blue>k</font><font color=red>r</font><font color=#990>a</font><font color=blue>k</font><font color=green>e</font><font color=red>n</font></b>, but the option to download maps for offline use has to be the main reason why this is awesome. The entire <a href="http://www.openstreetmap.org/" target="_blank">Open Street Map</a> project (see also the <a href="http://www.openstreetmap.de/" target="_blank">German version</a>) seems to be a cool project which is worth contributing to, even if it's just pointing out a house number here and there.