Version 4.2.1 of the netCDF Operators (NCO) has been released. NCO is an Open Source package that consists of a dozen standalone, command-line programs that take netCDF files as input, then operate (e.g., derive new data, average, print, hyperslab, manipulate metadata) and output the results to screen or files in text, binary, or netCDF formats.
The NCO project is coordinated by Professor Charlie Zender of the Department of Earth System Science, University of California, Irvine. More information about the project, along with binary and source downloads, are available on the SourceForge project page.
From the release message:
This release is laden with hyperslabbing and performance features. All hyperslabbing operators can now count backwards. Time-consuming intermediate files can be bypassed. ncra and ncrcat handle sub-groups of records at regular intervals. Time re-basing now works on "bounds" variables, e.g., time_bnds. Together, these features significantly ease working with large datasets like CMIP5.
Also NCO supports the new "diskless" feature of netCDF 4.2.1. Autoconf builds are now regularly tested on more platforms. Keep the suggestions coming for features you want.