The Zanzi Rig is available for download at create3dcharacters.com ($10/mnth subscription, cancel anytime).
Comes with a Zoo Tools PLE edition which includes all tools and the auto rigger for bipeds.
Also includes 21hrs of training for modelling, rigging texturing, lighting and animating cartoon characters like this.
Zoo Tools is by Hamish McKenzie.
Modelled/Rigged/Textured/Animated/Lit By Andrew Silke
Character Design By Kim Allen