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 While I do have backups, the original source code is in a very outdated state so I currently don't feel it makes sense to try and get it running again.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 3.32

MailCatcher

MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a web interface. Run mailcatcher, set your favourite app to deliver to smtp://127.0.0.1:1025 instead of your default SMTP server, then check out http://127.0.0.1:1080 to see the mail.

 Rubygem mailcatcher
 Score 2.9

Letter Opener

When mail is sent from your application, Letter Opener will open a preview in the browser instead of sending.

 Score 1.24

mail_view

Visual email testing

 Rubygem mail_view
 Score 0.39

Rails Email Preview

A Rails Engine to preview plain text and html email in your browser

 Score 0.2

sanitize_email

Email Condom for your Ruby Server. In Rails, Sinatra, et al, or simply the mail gem: Aids in development, testing, qa, and production troubleshooting of email issues without worrying that emails will get sent to actual live addresses.

 Score 0.04

post_office

A mock SMTP/POP3 server to aid in the development of applications with mail functionality.

 Rubygem post_office