Tom Sawyer Perspectives is a commercial software package for data visualization and analysis. It provides a graphical software development kit and preview environment, including layout and Tom Sawyer Software's proprietary data visualization reference architecture. The SDK is particularly aimed at developers seeking to create data-oriented visualization applications, and permits users to customize with toolbars, context menus, and editing behaviour, to name a few. Applications are designed to enable design sharing and reuse, including via web application deployment. The Java version of Tom Sawyer Perspectives is available for Windows, OS X and Linux environments, and .NET for Windows only. Evaluation copies are available on request; no prices are quoted on the site.