Bad news. The server hosting The Ruby Toolbox went bust on the evening of June 7th. While I do have backups, the original source code is in a very outdated state so I currently don't feel it makes sense to try and get it running again.

For the time being, here is a very stripped down version of the Ruby Toolbox's contents.

Update June 13th: I'd like to invite you to join the discussion on the future of the Toolbox on github. You can also get in touch directly on Twitter.

Christoph
 Score 9.69

New Relic RPM

New Relic is a performance management system, developed by New Relic, Inc (http://www.newrelic.com). New Relic provides you with deep information about the performance of your web application as it runs in production. The New Relic Ruby Agent is dual-purposed as a either a Gem or plugin, hosted on https://github.com/newrelic/rpm/

 Rubygem newrelic_rpm
 Github newrelic/rpm
 Score 8.38

dashing

This framework lets you build & easily layout dashboards with your own custom widgets. Use it to make a status boards for your ops team, or use it to track signups, conversion rates, or whatever else metrics you'd like to see in one spot. Included with the framework are ready-made widgets for you to use or customize. All of this code was extracted out of a project at Shopify that displays dashboards on TVs around the office.

 Rubygem dashing
 Github Shopify/dashing
 Score 7.0

better_errors

Provides a better error page for Rails and other Rack apps. Includes source code inspection, a live REPL and local/instance variable inspection for all stack frames.

 Score 3.97

bullet

help to kill N+1 queries and unused eager loading.

 Rubygem bullet
 Github flyerhzm/bullet
 Score 3.66

fnordmetric

FnordMetric is a Ruby Event-Tracking gem on steroids

 Score 2.5

meta_request

Supporting gem for Rails Panel (Google Chrome extension for Rails development)

 Rubygem meta_request
 Score 1.61

peek

Take a peek into your Rails application.

 Rubygem peek
 Github peek/peek
 Score 1.29

Rails-footnotes

Every Rails page has footnotes that gives information about your application and links back to your editor.

 Score 1.02

dashing-rails

The exceptionally handsome dashboard framework for Rails.

 Score 0.9

rack-bug

Debugging toolbar for Rack applications implemented as middleware

 Rubygem rack-bug
 Score 0.51

metriks

An experimental metrics client.

 Rubygem metriks
 Github eric/metriks
 Score 0.18

Rails metrics

Metrics measurement for your app on top of ActiveSupport::Notifications

 Score 0.17

rack-insight

Debugging toolbar for Rack applications implemented as middleware. Based on logical-insight and rack-bug.

 Score 0.14

Rackamole

Observe your web applications in the wild! == DESCRIPTION

 Rubygem rackamole
 Score 0.13

harness

Collect high level application performance metrics and forward them for analysis

 Rubygem harness
 Score 0.11

fozzie

Gem to make statistics sending from Ruby applications simple and efficient as possible. Currently supports Statsd, and is inspired by the original ruby-statsd gem by Etsy.

 Rubygem fozzie
 Score 0.09

system-metrics

System Metrics is a Rails 3 Engine that provides a clean web interface to the performance metrics instrumented with ActiveSupport::Notifications

 Score 0.08

slowgrowl

Surface slow code paths in your Rails 3 app via Growl / libnotify

 Rubygem slowgrowl

The Rails View Annotator makes it easy to find out which partial generated which output

 Score 0.04

Query trace

With query_trace enabled, the Rails logs will contain a partial stack trace for every executed SQL statement, making it easier to find where they are generated in your code.

 Rubygem query_trace
 Score 0.01

fozzie_rails

Gem to make statistics sending from Rails applications simple and efficient as possible

 Score 0.01

rails_instrument

Middleware to show instrumentation information in http headers

 Score 0.01

metriksd

Server for handling metrics from metriks

 Rubygem metriksd
 Score 0.0

how_slow

A gem for collecting Rails application metrics. No server or 3rd party services required.

 Rubygem how_slow