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.
ssdiff can now produce color-coded, highlighter-style, tabular diffs (e.g. as .xls files), and sspatch can apply them. Such diffs can be converted to/from text diffs. Diffs can be made between csv, xls, mdb, sqlite, and mysql sources. All but mdb can be patched.
