Electronic maps have replaced the traditional printed maps for a long time, especially after GPS became popular. So, most GPS device users should be familiar with OziExplorer. It is a very classic and excellent GPS mapping program developed by Des Newman from Australia in 1996. It is highly customizable, and allows to use and create custom maps for remote locations that are not fully covered by the major map providers like Tele Atlas. Therefore, it is deeply favored by outdoor enthusiasts (especially off-road drivers and adventure travelers).

BackCountry Navigator (AKA: BackCountry Navigator TOPO GPS) is an offline GPS map navigation app mainly used for outdoor adventures, developed by CritterMap Software. It can turn your Android-based smartphone or tablet into an outdoor navigation tool that can perfectly replace the traditional handheld GPS devices. Although the software is small in size, it is powerful enough, and supports downloading maps and aerial photos over the Internet.