WRF NetCDF Extract & Join (wrfncxnj) is a tool written in python that allows the user to generate CF compliant NetCDF files from the files generated by the Weather Research and Forecasting (WRF) model. The tool is intended to be used from the command line or a Shell script, and offers many options as flags:
WRF NetCDF Extract & Join has been developed by the Santander Meteorology Group at the University of Cantabria, and is released under GNU license.
Get the tool here.