Design Doll needs to be downloaded and is pretty good, but uhh.... you can't save the pose unless you buy the premium version, which is a hefty, hefty chunk of cash. ($80 last time I checked)
Other than that, in the free version you can change each component body type (hands, legs, arms, torso, etc) and proportions (from anime to realism).
Another great thing is that there are design doll forums that you can get user-made poses from, and user-arranged proportions.
I just screenshot the pose I need and then use it as a rough guide for perspective, etc