Ok so I totally just found the most amazing program!!!!!!! Its called Poladroid, and what it does it it takes your regular digital files and makes them look like polaroids.
What I like about it is the fact that you can shake your photo and stop it from finishing, if you are happy with how it looks mid-developement.
The program comes with a cute desktop polaroid camera which you drag and grop your photos into and then PSSSHT and here comes your photo...either wait for it to develope...or shake to make it quicker. HAHA so here are a few of mine