Anatomy 360 sells Real-time 3d scanned reference Pose Packs for artists. These Packs start at $5.00.
You're probably thinking, "but I don't really want to spend any money", and that's ok because they also have a large library of free poses on their website which you can find here.
Here are a couple of examples.
When your drawing away and getting better as an artist using these amazing reference poses don't forget to do it in an illo!