Free Blender Rig by TOAnimate Animation School:

• Made by animators for animators​​​​​
• Great introductory Blender rig​​​​​​​​​​​​​
• Perfect for walk cycle & body mechanic practice​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​
• Several digital facial expressions
• ​Comes with a PDF handbook​​​​​​​​