WaterCom Engineering - Offers software and computational and consulting services for hydrology, hydraulics, and related applications. Offers a CD with a large collection of useful programs. WaterWare: Water Resources Management Information System - Decision support software from Environmental Software and Services GmbH. Hydromantis Inc. - Offers GPS-X software, a modeling and simulation software for wastewater treatment plants. Linko Industrial Pretreatment Software - Modular software for industrial pretreatment tracking. USGS Water Resources Applications Software - Hydrologic and hydraulic modeling and analysis programs in geochemical, ground water, surface water, and water quality categories. Programs include PHREEQC, NETPATH, MODFLOW, MOC, SUTRA, FEQ, HSPF, GenScn, PeakFq, SWStat, and BLTM. Environmental Modeling Systems, Inc - GMS, SMS and WMS, provide user-friendly, graphical user interfaces for industry-standard numerical models in groundwater, surface-water, and watershed modeling applications. Anderson-Hydro - Offers the arid lands hydrology model (AHYMO) program for computing hydrographs and sediment yield in applications such as analysis of storm sewers. StormTac - Watershed-based Excel model for quantification of material transport by stormwater and design of stormwater treatment facilities. Catchment Simulation Solutions - Free GIS based catchment parameterization and flood modeling software with DEM orientated hydrologic rainfall runoff model. CatchmentSIM Software - Hydrologically orientated terrain analysis software for mapping catchments and building models. nofdp IDSS - Open source application for the interactive development of flood risk strategies and 1D hydrodynamic flood simulation. HCP Software Pty Ltd - Provides software (WATSYS, WaterMax and WATHAM) for engineering analysis, modelling and simulation of hydraulic performance, drinking water quality, fluid transients, surges, water hammer, system control and fire flows in water supply systems. DHI: Water Resources - Offers MIKE, modeling software developed for rivers, groundwater, flooding, sediment transport or ecology, screening analyses or detailed studies.