Ascend is an open source app for vector and raster maps.
CUSTOMIZABLE
* Includes a simple, customizable style for OpenStreetMap vector tiles with modes for hiking, biking, and transit.
* Generate and import your own tiles from OpenStreetMap extracts.
* Overlay customizable hillshading, shaded relief, contour lines, and slope angle shading calculated in real-time over any base map.
* Supports plugins for search, routing, map sources and more.
* Add new online map sources and combine layers to create new maps.
COMPREHENSIVE
* Offline search
* Wikipedia search
* Manage saved places
* Show geotagged photos from your Photo Library.
* Create and edit routes
* Record and edit tracks for hiking, fitness, and more
* Save map tiles for offline use
Learn more at https://github.com/styluslabs/maps