When a pencil and a sheet of paper aren't handy, Penultimate is an iPad app that lets you sketch, draw and write with a simple stroke of your index finger. Quickly jot a reminder in Penultimate to pick up the kids from soccer practice, and you'll see words take shape into a readable font unique to the application. Draw a map to give a friend directions to a specific destination, or write yourself a note to call your mother after dinner. If you're thinking about redecorating a room in your home, brainstorm while sketching a rough layout of the new arrangement before lifting any furniture. Choose between graph, lined and plain paper backgrounds, and if you make a mistake, you don't have to start over from scratch! Use the eraser function to delete as much -- or as little -- as you need, exactly as you would if you were using a pencil instead of your finger.