A very nice and powerful program, built over the rsync
protocol, is Unison.

It has a very nice interface, and the client is available for at least Linux (more or less all variants) and Windows. The basic behavior is very easy to grasp, with a graphic interface and easy configuration, and if you need to do more complex things, you can manually edit the configuration files and/or script it.
It has been my backup/mirroring/uploading utility in the last five year at least, and never saw a bug or missed a file.
You can install it with
sudo apt-get install unison-gtk
and for a smooth behavior, you should have configured a working connection with your endpoint (I normally use ssh connections).
gksu nautilus
to runnautilus
as sudo user – sagarchalise Mar 13 '14 at 08:01sftp://...
links are stored in:/run/user/1000/gvfs/sftp*
(Of course your user id and sftp folder name will vary). – ThorSummoner Jul 21 '15 at 18:08