From Sylwester Balcerek:
Genedator is a tool that helps you to generate data for your database. Set of dynamically loaded generators allows you generating any combination of data regarding columns type and purpose. Using Genedator you can generate e.g. email addresses, country names, descriptions, random numbers, town names and others sets of realistic data. Moreover you can create your own custom generator of data. Genedator is application created in Java language. It is plugin-based application. Each generator is independent plugin which is dynamically loaded and recognized by Genedator application. Genedator application can be considered as a framework. Inside this framework plugins can be runned so data can be generated.