Application for building web photo albums. Features: FTP Browser, Exif viewer, Thumbnail and Image processing, HTML generation, CSS styles, slideshow (Javascript or JavaFX). Just build your gallery and upload. You won't need Ruby on the server.
Ohm is a free (open source) server manager, allowing Linux server configuration via an easy-to-use web interface. It aims to be an alternative to Plesk, cPanel and the like. DEVELOPMENT HAS BEEN MOVED TO GITHUB: http://github.com/Ohm-panel
It is an experimental project developed for synchronization of folders with a FTPserver. It was developed when dropbox, sugarsync werent hit ;)
It can be studied for using ruby for such purpose. Not in shape for using it for practical purpose.