http://linuxlandit.blogspot.com – Aura tool is a desktop background setter, capable of: picking image randomly from specified paths; skipping too small images and images with too different aspect rate; rescaling it in a clever ways (crop solid margins, resize with cubic, then liquid rescale algorithm) to fit the desktop with as little quality loss as possible; labelling images (that is, rendering the label in the corner) using embedded tags; daemonizing to pick new image on a time-basis or when triggere (HowTos)