Although it didn't make the original list, one of the things I really missed during my Ubuntu adventure was SyncToy, from Microsoft.
It allows me to run all sorts of "choose your own" style backups, and make them as deep or simple as I want. This is good.
What it doesn't do is perhaps work more complicated, or have fancy feedback styled logging with pretty beautiful error output.
I don't care. It's free, it works, and I like its simplicity.
Find it here at Microsoft.