I wrote a small Swing Java application that I've named TVTRemote that I use as a remote control for tvtime. I typically run it on my laptop to manage tvtime on my desktop. It uses SSH invoke various commands such as "tvtime-command". It can also lock and unlock the screen saver with "gnome-screensaver-command".

Click here for a screenshot. You can download it here. It's GPL v2 or later and the source is included in the JAR file.