There are a few good ones on GitHub: https://github.com/jm81/ach https://github.com/jm81/ach At my old company, we manually had someone use ACH Tools to build o

There are a few good ones on GitHub: https://github.com/jm81/ach https://github.com/jm81/ach At my old company, we manually had someone use ACH Tools to build out these files, upload to the bank's interface, etc.: http://www.achtools.com/HomePage.aspx#!/ http://www.achtools.com/HomePage.aspx#!/