This document summarizes and compares several prototyping tools, including Axure, Easel, InVision Protoshare, and Balsamiq Mockups. Key points covered include unique features of each tool, such as gesture support in Axure and animation capabilities in InVision Protoshare. The document also discusses how different tools can be used at different stages of the design process, from low-fidelity sketching with Balsamiq to high-fidelity prototyping and user testing with InVision Protoshare. It concludes by asking what prototyping tools are commonly used in Nashville.