Authentication: restful-authentication, authlogic, clearance, open_id_authentication Authorization: can_has E-Commerce: active_merchant, ssl_requirement Plugins: will_paginate, geokit, acts_as_commentable, acts_as_versioned, acts_as_state_machine(aasm), acts-as-list, attachment_fu, attribute_fu, subdomain_fu shortcode_url, jrails , advanced_errors, annotate_models, paperclip, recaptcha, redcloth, xss_terminate, inherited_resources, autochronic, pluginaweek-state_machine, whenever, chronic, awesome_nested_set, pacecar, high_voltage, fastercsv Templates: haml, compass, sass, ERB, 960.gs grid framework Testing: mocha, shoulda, cucumber, webrat, fakeweb, test unit(functional, unit), RSpec(models, views, controllers, helpers), Factory Girl Search: named_scopes , ThinkingSphinx , ultrasphinx, simple_column_search