I do not know how about you, my Ruby on Rails developing readers, but I am a big fan of Redmine. Redmine is a project that started 4 years ago to deliver project management support for Project Managers working with clients wanting Ruby on Rails applications and team responsible for coding such Ruby on Rails applications.
Of course, you can use Redmine to manage projects written on different platforms, but they reason i am using Ruby on Rails name is that there are certain benefits for using open source project management tool written using framework and a language that you use in your everyday work.

Imagine that you’re Project Manager and you have your favourite Project Management tool. It’s perfect in many aspects but you need just a tweak here and there and maybe a feature or two. What do you do?
Well, you may ask a developer of your project management tool to fix something for you or request new functionality. And this may take a lot of time or even never happen. But if you’re Ruby on Rails developer and you’re using project management tool written using Ruby on Rails platform then you’re basically there!

Just download source code and open your trusty editor!  Isn’t that neat? Especially, when Redmine is written with a great support for Ruby on Rails plugins, because every Rails application has such predispositions for this and because Redmine creator – Eric Davies – had left many hooks in his Ruby on Rails code for plugin creator to use.

Although current Redmine release is still RC, Davis claims that it is stable enough version that might be used in production – and this means for use in your Ruby on Rails project management.

So go and grab Redmine from the official site if you haven’t already. Or suggest doing so for you PM in charge