A plugin for KeePass
Using this plugin you can synchronize your password database using OpenSSH, which must be installed on your computer, as a client.
Just Open URL or Save as URL on the File menu an provide an URL starting with sftp://
For now, you must use RSA Authentication through the SSH Agent.
The Password Authentication is not yet implemented.
You can extensively use the OpenSSH SSH client configuration files (man ssh_config) to customize your URL.