XMLDiff aims at providing efficient diffs on XML files. Features include detection of modified items, added items, and removed items. It is not sensitive to item position changes (based on an ID). It is designed to support large XML files (about 100 Mo). It has basic XML manipulation (XSLT, deletion, etc.), scripting capabilities, and simple command line usage.
RPhoto is a handy image editor to simplify cropping of digital camera pictures and avoid white borders introduced by incorrect height/width ratios. It also has lossless rotate and flip features, as well as a unique way to rectify a bad angle by only drawing a horizontal or vertical line.