http://www.macnn.com/articles/02/10/11/executive.sync/
Executive Sync 1.1.1 offers time, state sync
updated 11:25 am EDT, Fri October 11, 2002
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The OS X-only sync utility Executive Sync 1.1.1 uses "the superior TAS (Time And State) synchronization technique. TAS is a powerful approach to file synchronization that guarantees accuracy by storing and comparing true CRC32 bit checksums over time." The application ($20) supports file archiving, multiple projects, Windows server support, file history, long file name support, and unicode file names.
