cvs tools

For those who have to deal with cvs data files, here is a tool to do de-duplication

• http://source.mozillaopennews.org/en-US/articles/introducing-cvsdedupe/
• https://github.com/datamade/csvdedupe

Here are tools for working with cvs files.
http://csvkit.readthedocs.org/en/latest/

Do you know of any others?