We've released the latest in our line of The Lazy GM series of pre-generated creatures ready to use in your game.
Doppelgangers features an array of doppelganger characters, with added classes and templates to give stat blocks for Pathfinder and 3.5, with a clickable index ordered by CR, class and template to take you right to where you need, as well as suggestions for using them in your game.
PDF available for $0.99 from DrivethruRPG or RPGNow