A few weeks back I ran into Poladroid. The idea sounded like fun, and possibly even handy at times: take an image and make it look a little like (what most people think of as) a Polaroid. Sadly (for me), the software was only available for the Mac, but I did notice that a Windows version was coming soon (I run Windows and GNU/Linux here).
Checking today I noticed that the Windows version was finally available, so I had to have a quick play:
This might be fun for some images.