RailsApp Monitoring

• Rails monitoring without the enterprise cruft.
  Tired of setting up complicated monitoring systems on each of our servers we asked: why not manage it all from a single web interface? Scout was born. Originally an internal tool, we discovered a community of Rails developers that wanted to make monitoring easier. Scout now lets any developer make smart decisions about their Ruby on Rails applications and servers.
  http://scoutapp.com
• FiveRuns
  TuneUp - Free and Easy - Optimize your Rails andMerb application performanceCatch potentially costly performance and scalabilityproblems before your applications go into production with FiveRuns TuneUp.
  Manage - Monitor Rails application performance in productionEnsure your production Rails applications are performing at their best. FiveRuns Manage is the only application that gives you visibility into every part of the Rails stack — from OS to app.
  http://www.fiveruns.com/
  
• BleakHouse: Tool to find memory leaks in your Rails applications
  

  

  Bleakhouse is a new Rails plugin by Evan Weaver that helps you find memory leaks in your Rails applications. It does this by hammering ObjectSpace for information throughout the execution of your app and by producing pretty charts to show you what's going on. It's easy to install and get running, so if memory leaks or application stability have proven to be sore points for you, give it a try straight away.
  http://blog.evanweaver.com/files/doc/fauna/bleak_house/files/README.html
  http://blog.evanweaver.com/articles/2007/04/28/bleak_house/