Cool:gen is a model-driven application development tool that generates code for complete software solutions across various platforms. It aims to simplify development by shielding developers from complex multi-tier application building. Cool:gen provides integrated tools linked by a framework for flexibility. Compared to similar tools like JDeveloper and RationalRose, Cool:gen supports multiple databases and languages. It offers benefits like consistency, full-code generation, and technology independence. Statistics show it can significantly boost productivity and reduce errors versus non-model-driven development.