gtool 

GTOOL is a set of tools for grid point data analyses.

GTOOL3 is now evolved into gtool project, where netCDF scheme (gtool4 netCDF convention) suitable for problems in geophysical fluid dynamics is investigated and its Fortran 90 netCDF I/O library (gtool5) is being developed.

GTOOL3 can be reached from "old resources" in gtool project. A ruby script transfer tool from GTOOL3 data to netCDF data is also available there.