phpbb-auth - A rails plugin/gem allowing you to use an existing PHPBB forum for handling users/authentication in your rails app.

Monit Aggregator is a Sinatra app that aggregates the data from your Monit web interfaces onto 1 page. There is also a free hosted version at Runs Like Clockwork - server monitoring.

S3ify is a command line tool to make life easier when putting the assets for a HTML email onto S3. It converts any local image references in your HTML and then uploads it all onto S3 for you.

Sync your development environment data with production script - Heres how I setup a rake task to pull the database data and images from my production server to use in my development environment.