COOPY is a set of tools for distributed data projects. It supports diffing, patching, merging, and revision control of tables in a variety of formats (CSV, Excel, MySQL, Sqlite, etc).
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This release adds lots of new options for how tables are compared. Diffs can now omit information about added/removed columns, to make it easier to keep a version of a table with columns stripped out (or private columns added) in sync with the original. Case-insensitive diffs are now supported.