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 Name                                               Last modified      Size  Description
 Parent Directory                                                        -   directory (probably)
 Data One - American Meteorological Society - Pr..> 23-Mar-2012 09:15  6.7M  directory (probably)
 Oak Ridge National Laboratory - Best Practices ..> 23-Mar-2012 09:16  1.3M  Adobe portable document

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As well as the national data archives of at least two (that I know of) of the world's largest countries, checksum gets recommended all over the place, by people who know what they are talking about.

Enjoy!

;o) Cor