This document discusses visual tools for service design. It begins by noting the growing complexity of what designers deal with and the need to represent intangible elements. It then discusses how tools help designers communicate with different stakeholders like experts, employers, and users. The document goes on to categorize existing visualization tools based on factors like the design activity, recipients, contents, and type of representation. It concludes by introducing a toolbox website that collects tools from different fields for researchers and designers.