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    First ever entry here so not sure if this fits in or not. Also its in C#.

    I have been working on a data generation tool that uses a syntax similar to regex (it differs in many ways). It started off as a library to generate flat csv files with various ranges of random data for each field and it has slowly evolved into a command line tool that I have added to over time. You can add generation patterns to template documents, use named patterns, add your own pattern files etc.

    https://github.com/SecretDeveloper/TestDataGenerator