Recently, I went to the QGIS website to check out the most recent version of QGIS for Android. Note: This is a project in process and it has some limitations. Install at your own risk!
To download and install QGIS for Android visit here. Note some files do not contain all assests/files for all devices. For my Nexus 7 Tablet, I found the correct installation files here: http://www.opengis.ch/2012/11/21/new-qgis-workaround-version/
My tablet is WiFi only, but one can easily imagine the applications in the field with the added functionality of GPS. I wanted to test how responsive it would be, so I loaded a shapefile of all census tracts in Maryland. It was fairly responsive but did take several seconds to load. Since many GIS files come zipped, you will also want to download an app for unzipping files.
For someone who has only used GIS software on a desktop, it is a joy to be able to navigate, zoom, and idenity by touch. A screenshot appears below.
|QGIS for Android on a Nexus 7 Tablet|