Windows – Minimal rsync installation without need for cygwin

You need an rsync command on the server, but you don't need to run a daemon.

Get an rsync binary that works on the server, put it somewhere in your home, and add this flag to your command line: --rsync-path=/home/user/path/to/rsync .

If you don't want to copy rsync to the servers, you can use scp, or sshfs.

sshfs user@host ~/sync/user-host
rsync -av ~/local-dir ~/sync/user-host/remote-dir

In that case rsync will run completely locally, but the changes will be propagated to the server.

Unison looks like it fits the bill. You could try the -repeat watch -fastcheck true options.