Tiptoe is the first privacy application to bring a "private browsing"-like feature to all sorts of applications. Tiptoe lets you chat, view images and movies, edit documents and more with the confidence that a trail of your actions won't be stored. If you need it to, Tiptoe can clean up your old trails.
it kinda looks like a lesser and not as refined version of software made by koingo -- has a Windex bottle for an icon -- also costing $20 i think. but i haven't tried Tiptoe, i just glanced at the screenshot and did a quick read.