Testify develops an open source, model-based test tool (ecFeed) that supports multi-purpose automated generation of test data.

The tool uses simple, model-based specifications of input domain properties, and generates test data with the desired volume and coverage based on combinatorial, random and adaptive random test strategies.

You can export the data using a set of predefined templates, or you can create your own. It has support for various programming languages, and is compatible with the most popular testing frameworks.