airbrake (rubygems): Airbrake is an online tool that provides robust exception tracking in any of your Ruby applications. In doing so, it allows you to easily review errors, tie an error to an individual piece of code, and trace the cause back to recent changes. The Airbrake dashboard provides easy categorization, searching, and prioritization of exceptions so that when errors occur, your team can quickly determine the root cause.  Additionally, this gem includes integrations with such popular libraries and frameworks as Rails, Sinatra, Resque, Sidekiq, Delayed Job, Shoryuken, ActiveJob and many more. 
Keywords: airbrake|apm|capistrano|crash-reporting|delayed-job|error-monitoring|logger|performance-monitoring|rails|rake|resque|ruby|shoryuken|sidekiq|sinatra|sneakers