Randomly chooses an image from a directory of your choosing to be your wallpaper at a specified time interval. Supports usage of OI File Manager.
update: i'm going to make some changes in the coming months that probably involve revert the last versions changes since they introduced some bugs. feel free to email me for suggestions.
For more detailed instructions,
a bunch of changes by Dániel Kalmár.
turned stretching into scaling (keeps aspect ratio, can up&down scale)
better way to figure out if image needs rotating
the scaled & rotated image is only generated once and cached
added white background to preferences screen
all the features should work well together in any permutation