In almost every app you create there is a contact form. Since you repeat the same steps over and over. So it’s better to create a ror plugin: contact form generator.

The generator gives you a good starting point for further modifications.
Specs will be generated if Rspec is available.
Dependencies: ActiveForm plugin

Installation
script/plugin install git://github.com/cs/active_form.git
script/plugin install git://github.com/masone/contact-form-generator.git
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This plugin will automatically add Google Analytics code to all of your pages, instead of manually having to add it to app/views/application.rhtml. You put your tracker id in config/environment.rb and it Just Works. It will, by default, only work in production mode, and you can switch it off for particular controllers and actions.

To install it, add plugin repository to your rails plugin sources:

script/plugin source http://svn.rubaidh.com/plugins/trunk

and to install the Google Analytics plugin:
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Quick Rails plugin that allows you to send an SMS from your application. This does not require any kind of “gateway” or third-party service to get the job done. The plugin takes in a phone number, the carrier, and a message. From this information, it will format an e-mail correctly that will actually end up being sent to that phone in the form of a text message. How easy is it to use? Very.

You can grab the latest from GitHub.

git clone git://github.com/brendanlim/sms-fu.git vendor/plugins/sms_fu
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Rails plugin that easily allows you to show video streams on your site. Currently, YouTube and Vimeo streams are supported.
#video_url is expected to be in these formats:

YouTube: http://www.youtube.com/watch?v=gEILFf2XSrM
Vimeo: http://www.vimeo.com/726135
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The Exception Notifier plugin provides a mailer object and a default set of templates for sending email notifications when errors occur in a Rails application. The plugin is configurable, allowing programmers to specify:

* the sender address of the email
* the recipient addresses
* the text used to prefix the subject line

The email includes information about the current request, session, and environment, and also gives a backtrace of the exception.
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A simple plugin to help separate sensitive configuration such as server passwords from your Rails source code.

Repository: git://github.com/peter/server_config.git

Example

Server parameters are configured in a config/server.rb file:
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Most web applications have many more model objects exposed on the backend, or admin side, than they do on the front. Coding interfaces for all those models is redundant and a waste of resources when all you need is CRUD functionality that’s smart enough to handle all your ActiveRecord associations.

Enter the ActiveScaffold plugin. ActiveScaffold provides you with a wealth of dynamically created goodness:

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Acts As Authorizable is a part solution for providing pseudo-hierarchical role based authorizations on ActiveRecord model instances using your existing database table relationships. It is designed to eliminate the need for deep nesting controllers due to authorization. That being said, it is only part of a total authorization mechanism. Essentially it takes an authorized? call and passes it to the appropriate Role.allows? methods. You still have to define filters in controllers that call ActiveRecord models authorized? method and write the allows? method in your role class.
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This plugin is based on acts_as_taggable by DHH but includes extras such as tests, smarter tag assignment, and tag cloud calculations.

Installation

ruby script/plugin install http://svn.viney.net.nz/things/rails/plugins/acts_as_taggable_on_steroids
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validate_attributes is a really simple plugin to validate specific attributes of a model unlike the method valid? which collectively validates all the attributes. This plugin provides the functionality of validating specific attribute(s) and skipping others’ validations and vice versa.

Installation : svn://vinsol.com/plugins/sur/validate_attributes
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