We created this from a fork of Placemark[0] to give water utilities an alternative choice to the big players, Autodesk and Bentley.
The majority of commercial modeling software uses the U.S. EPA's engine and adds a nicer interface. They all fork the engine to add enhancements but don't contribute back.
This is our attempt to create an open-source alternative for water engineers and contribute back to the core engine at the same time.
You can check out the source code on GitHub[1].
[0] https://github.com/placemark/placemark
[1] https://github.com/epanet-js/epanet-js
