Lean Canvas: Ideal for Founders or Product Managers
Lean Canvas is a fantastic 1-pager succinct summary of business model of any venture (I've even seen people using this for non-profits !) identifying Product/Service Risk, Customer Risk and Market Risk simultaneously.
Based on hypothesis and continuous learning, this canvas goes through a round of iterations before converging onto the winning business model.
Here is the v1.0 for BeyondCalories -