What non-trivial Ruby applications exist?
What publicly available open source Ruby applications (not frameworks) exist apart from web applications?

This question is similar to http://stackoverflow.com/questions/150638/ruby-off-the-rails , except that's about anecdotes of what Ruby applications they've created, which aren't necessarily publicly available.

These applications should be non-trivial: ideally multiple committers, with well-designed code to handle the complexity of their task.

One example would be the [Metasploit Project](http://en.wikipedia.org/wiki/Metasploit_Project).

Background: Asking in response to http://stackoverflow.com/questions/7114521/framework-for-non-web-ruby-project, where I realised that I haven't seen any examples of Ruby applications that aren't one-person projects.
What non-trivial Ruby applications exist?
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What publicly available open source Ruby applications (not frameworks) exist apart from web applications?

This question is similar to http://stackoverflow.com/questions/150638/ruby-off-the-rails , except that's about anecdotes of what Ruby applications they've created, which aren't necessarily publicly available.

These applications should be non-trivial: ideally multiple committers, with well-designed code to handle the complexity of their task.

One example would be the [Metasploit Project](http://en.wikipedia.org/wiki/Metasploit_Project).

Background: Asking in response to http://stackoverflow.com/questions/7114521/framework-for-non-web-ruby-project, where I realised that I haven't seen any examples of Ruby applications that aren't one-person projects.