The donationware "Poladroid" is a blast!It makes you wait as the image appears just like a Polaroid in front of you. It's a stand-alone. http://www.poladroid.net/
Personally I'm currently into all sorts of irreverence with film (xray film, river water as developer, tylenol, coffee, vitamin C and fertilizer as fixer) having religiously followed dev. charts in my teens.
-- robert