I discovered Arq a couple years ago and have been using it ever since. I highly recommend it. The thing that sold me was that the file format is documented and

I discovered Arq a couple years ago and have been using it ever since. I highly recommend it. The thing that sold me was that the file format is documented and I was able to write code to read the backups directly. So even if somehow Arq does disappear, I can still read my data. http://godoc.org/code.google.com/p/rsc/arq http://godoc.org/code.google.com/p/rsc/arq