How to: Error Handling
* [Airbrake](https://github.com/airbrake/airbrake) - The official Airbrake library for Ruby on Rails (and other Rack based frameworks).
* [Better Errors](https://github.com/charliesome/better_errors) - Better error page for Rack apps.
* [Bugsnag](https://github.com/bugsnag/bugsnag-ruby) - Error monitoring for Rails, Sinatra, Rack, and plain Ruby apps.
* [Errbit](https://github.com/errbit/errbit) - The open source, self-hosted error catcher.
* [Exception Handler](https://github.com/richpeck/exception_handler) - Custom error pages.
* [Exception Notification](https://github.com/smartinez87/exception_notification) - A set of notifiers for sending notifications when errors occur in a Rack/Rails application.
* [Honeybadger](https://www.honeybadger.io/) - Exception, uptime, and performance monitoring for Ruby.
* [Nesty](https://github.com/skorks/nesty) - Nested exceptions for Ruby.
* [Sentry Ruby](https://github.com/getsentry/sentry-ruby) - The Ruby client for Sentry.
* [Rollbar](https://github.com/rollbar/rollbar-gem) - Easy and powerful exception and error tracking for your applications.