1. mocsy - improved routines to model the ocean carbonate system (Fortran, usable in Python)
   • publication
   • code
2. fastspline - the fastest cubic spline in the west (Weinart, 2009) written in MATLAB was converted to Fortran (and is usable in Python)
   • code
3. seacarb - computes seawater carbonate system parameters (R)
   • CRAN archive
   • GitHub archive
4. errors - routine to propagate uncertainties for the marine CO₂ system
   • available as an extra sheet in to CO2SYS-Excel (used in Excel)
   • available as add-on to CO2SYS-MATLAB (used in MATLAB or Octave)
   • also available within mocsy and seacarb packages
5. derivnum - routine that calculates sensitivities (buffer factors) for the marine CO₂ system
   • available as add-on to CO2SYS-MATLAB (used in MATLAB or Octave)
   • also available within the mocsy and seacarb packages