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    • MODFLOW 6 nightly build
      Creative Commons Zero v1.0 Universal
      7800Updated Apr 25, 2026Apr 25, 2026
    • modflow6

      Public
      USGS Modular Hydrologic Model
      Fortran
      Other
      1563454027Updated Apr 24, 2026Apr 24, 2026
    • Tools to help generate input and view output from groundwater models
      Pascal
      8600Updated Apr 23, 2026Apr 23, 2026
    • MODFLOW development toolkit
      Python
      Other
      7271Updated Apr 22, 2026Apr 22, 2026
    • mt3d-usgs

      Public
      MT3D-USGS Repository
      Fortran
      Creative Commons Zero v1.0 Universal
      1427130Updated Apr 15, 2026Apr 15, 2026
    • mf2005

      Public
      MODFLOW-2005 repository
      FreeBASIC
      58132Updated Apr 14, 2026Apr 14, 2026
    • mfusgt

      Public
      MODFLOW-USGT
      Fortran
      Creative Commons Zero v1.0 Universal
      3201Updated Apr 4, 2026Apr 4, 2026
    • Collection of MODFLOW 6 example models
      Python
      565711Updated Apr 1, 2026Apr 1, 2026
    • zonbudusg

      Public
      Program to compute and print volumetric budgets over subregions of a flow system that is being simulated using the USGS MODFLOW Unstructured Grid (USG) Model
      Fortran
      Creative Commons Zero v1.0 Universal
      2201Updated Apr 1, 2026Apr 1, 2026
    • zonbud

      Public
      ZONEBUDGET: A Program for Computing Subregional Water Budgets for MODFLOW Groundwater Flow Models
      Fortran
      Creative Commons Zero v1.0 Universal
      2100Updated Apr 1, 2026Apr 1, 2026
    • gridgen

      Public
      GRIDGEN: A Program for Generating Unstructured Finite-Volume Grids
      C++
      Creative Commons Zero v1.0 Universal
      3300Updated Mar 31, 2026Mar 31, 2026
    • triangle

      Public
      A Two-Dimensional Quality Mesh Generator and Delaunay Triangulator.
      C
      Other
      2110Updated Mar 31, 2026Mar 31, 2026
    • xmipy extension for the MODFLOW API
      Python
      Creative Commons Zero v1.0 Universal
      183092Updated Mar 20, 2026Mar 20, 2026
    • MODFLOW 6 example problems
      QuickBASIC
      14600Updated Feb 25, 2026Feb 25, 2026
    • Large Tests for MODFLOW 6
      FreeBASIC
      5200Updated Feb 25, 2026Feb 25, 2026
    • vs2dt

      Public
      Water Flow and Solute Transport in Variably Saturated Porous Media
      Fortran
      Creative Commons Zero v1.0 Universal
      1000Updated Feb 23, 2026Feb 23, 2026
    • swtv4

      Public
      Three-Dimensional Variable-Density Ground-Water Flow and Transport
      Fortran
      Creative Commons Zero v1.0 Universal
      1000Updated Feb 19, 2026Feb 19, 2026
    • mflgr

      Public
      MODFLOW LGR: MODFLOW 2005 with Local Grid Refinement
      Fortran
      Creative Commons Zero v1.0 Universal
      1000Updated Feb 19, 2026Feb 19, 2026
    • mt3dms

      Public
      A Modular 3-D Multi-Species Transport Model for Simulation of Advection, Dispersion, and Chemical Reactions of Contaminants in Groundwater Systems
      Fortran
      Creative Commons Zero v1.0 Universal
      3620Updated Feb 19, 2026Feb 19, 2026
    • mf2000

      Public
      MODFLOW-2000 repository
      Fortran
      Creative Commons Zero v1.0 Universal
      2101Updated Feb 19, 2026Feb 19, 2026
    • mfnwt

      Public
      A Newton Formulation for MODFLOW 2005
      Fortran
      Creative Commons Zero v1.0 Universal
      1000Updated Feb 19, 2026Feb 19, 2026
    • modpath6

      Public
      MODPATH 6: Particle tracking for MODFLOW-2000 and MODFLOW-2005
      Fortran
      Creative Commons Zero v1.0 Universal
      1000Updated Feb 19, 2026Feb 19, 2026
    • MODPATH 7: Particle tracking for MODFLOW 2005, MODFLOW USG, and MODFLOW 6
      Fortran
      712112Updated Feb 12, 2026Feb 12, 2026
    • mfusg

      Public
      Public repository for MODFLOW-USG
      Fortran
      6980Updated Feb 12, 2026Feb 12, 2026
    • MODFLOW and related program executables for Windows, Mac, and Linux
      Python
      84620Updated Feb 10, 2026Feb 10, 2026
    • Template for creating Fortran projects with meson, pixi and CI
      Python
      0000Updated Feb 4, 2026Feb 4, 2026
    • Model Viewer for MODFLOW 6
      C++
      Other
      413340Updated Oct 3, 2024Oct 3, 2024
    • usgslatex

      Public
      TeX
      1001Updated Jul 28, 2024Jul 28, 2024
    • Build dependencies for Model Viewer for MODFLOW 6
      0000Updated Jan 26, 2023Jan 26, 2023
    • pumatools

      Public
      Microsoft Windows .NET component libraries and applications for MODFLOW data pre- and post-processing.
      C#
      0100Updated Jan 6, 2018Jan 6, 2018
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