Poladroid is a great little Mac app (Windows versions is unavailable but scheduled to be released soon) that coverts your images files into high resolution Polaroid like pictures. Its super easy to use and 100% free.

My images using Poladroid

My images using Poladroid

There is also a flickr group where you can post your images and view and comment on others users aswell.

Some of the features include (taken from website) an easy to use : Drag & Drop format, generate High-resolution pictures (400 dpi), “ready-to-print” with a Polaroid design, Funny : only 10 treatments per session, like the content of a cartridge ; interactive (look at the demo below) ; random and realistic Polaroid-like colors variation… image will never come out the same no matter how many times your run the app. Great if you want to give your images a “old” twist.