Inptools provides means to convert and reproject files in the EPANET INP format. It includes the shp2inp, inp2shp, epanet2csv, and inpproj commands. (EPANET is water supply network analysis software.)
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.