Aaron Eisenberger

jrails. jRails is a drop-in jQuery replacement for Prototype/script.aculo.us on Rails. Using jRails, you can get all of the same default Rails helpers for javascript functionality using the lighter jQuery library.

jquery-rjs. Add RJS for jQuery to Rails 3.1+ apps

acts-as-taggable-on. A tagging plugin for Rails applications that allows for custom tagging along dynamic contexts.

disable_timestamps_for. Selectively disable timestamping on specific fields in an ActiveRecord model.

best_in_place. A RESTful unobtrusive jQuery Inplace-Editor and a helper as a Rails Gem

premailer. Preflight for HTML email

nested_form. Rails plugin to conveniently handle multiple models in a single form.

lopr. Ruby

simple_cacheable. a simple cache implementation based on activerecord

taps. simple database import/export app

make_voteable. User-centric voting system for Rails 3 applications.

attribute_fu. a better version of this functionality is in rails 2.3. use that!

arel. A Relational Algebra

guard-rails. Restart the Rails development server automatically when using Guard

counter_culture. Turbo-charged counter caches for your Rails app.

userstamp_basic. A simplified version of UserStamp

ruby-saml-idp. SAML Identity Provider library in ruby

sidetiq. Recurring jobs for Sidekiq