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 While I do have backups, the original source code is in a very outdated state so I currently don't feel it makes sense to try and get it running again.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 1.9

premailer

Improve the rendering of HTML emails by making CSS inline, converting links and warning about unsupported code.

 Rubygem premailer
 Score 1.21

Roadie

Roadie tries to make sending HTML emails a little less painful by inlining stylesheets and rewriting relative URLs for you.

 Rubygem roadie
 Github mange/roadie
 Score 0.23

mail_style

Making HTML emails a little less painful. Writes css inline and corrects image urls.

 Rubygem mail_style

Module for ActionMailer to improve the rendering of HTML emails by using the 'premailer' gem, which inlines CSS and makes relative links absolute.

 Score 0.08

inline-style

Inlines CSS for html email delivery

 Rubygem inline-style
 Score 0.05

premailer-rails3

This gem brings you the power of the premailer gem to Rails without any configuration needs. Create HTML emails, include a CSS file as you do in a normal HTML document and premailer will inline the included CSS.

 Score 0.02

inline_styles

To make your HTML display properly when stylesheet support isn't available (e.g. Gmail) this lets you attach all your CSS to the 'style' attribute of each element.

 Score 0.02

incurve

InCurve provides some handy helper methods for your Rails app, letting you easily inline your CSS code.

 Rubygem incurve
 Github welaika/incurve

Convenient use of inline_styles gem with Rails 3.1+ and Rails 4

 Score 0.01

packrat

Packrat is a gem for merging all css rules to inline for html emails and files.

 Rubygem packrat