bup, a "Highly efficient file backup system..." written in Python: https://github.com/bup/bup Also, one of the best README's ever.
Replying to @oceankidbilly
@oceankidbilly Everything @apenwarr writes is gold. However, he has inspired me to write both a build tool and filesystem; be careful.
11:24 AM - 7 Jan 2014
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