This document discusses Sun HPC Software, Developer Edition for OpenSolaris, which provides an integrated development environment for building and testing HPC applications on clusters and clouds. It allows developers to easily set up and use OpenSolaris zones on their laptop for development and testing, and then deploy applications to public clouds like Amazon EC2. The software appliance provides tools like Sun Studio, Sun Grid Engine for job scheduling, and cloud connectivity through the Service Domain Manager. This enables developers to focus on coding without having to configure systems.