NiceTop downloads nice images from the internet and sets them to be your desktop wallpaper. You can snag images either from a Tumblr blog or Wallbase.
Usage: ./nice_top.rb -s SOURCE [options]
-s, --source SOURCE Select source (tumblr, wallbase)
-h, --help Print usage and options
Tumblr options:
-b, --blog BLOG Tumblr blog URL
Wallbase options:
-q, --query QUERY Specify search query
--allow-nsfw Allow NSFW images
--nsfw Get only NSFW images