Geo Elevation is a powerful tool to build a cross-sectional elevation chart from any paths/points on the map. Designed for both iPhone and iPad. Cost: $1.99

World Atlas HD puts our best maps in the palm of your hand. Unlike other map applications, the National Geographic World Atlas HD utilizes our highest resolution, press-ready images, providing you the same rich detail, accuracy, and artistic beauty found in our award-winning wall maps and bound atlases. The app is preloaded with 3 different styles of world maps, down to country-level detail. With an internet connection, you can continue zooming through continent-level maps into detailed Microsoft Bing maps. Designed for iPhone, iPod touch, and iPad. Cost: $.99

Find, read, and monitor thousands of scholarly journals available from your university or college library, or through Open Access publishers, covering all disciplines. Browse titles by subject to easily find journals of interest; easily view table of contents of current past journals; create a personal bookshelf of favorite journals; save articles to Zotero, Dropbox, and other services; share with other researchers by posting to Facebook, Twitter and more. By Third Iron, LLC. Designed for ipad. Cost: free. More information on how to link to Stanford University materials here.