Diffa is a small and simple diff/patch viewer for unified diffs and other text files.
* Color highlighting of unified diffs.
* Pinch-to-zoom to change font size.
* Copy text to clipboard.
* Double tap to switch to proportional font.
* Double tap also brings back action bar when hidden.
* Shows regular text files as well.
* Opens files from any storage or app.
Written because I failed to find any other app in Play that would view files with MIME type application/patch.