Use the hstore data type in Postgres to store hashes and interface with it using the activerecord-postgres-hstore gem.

Generate a Rails 3 app with the application templates Quick Left uses to start their projects off right!

Generates CSS sprites on the fly by using `background: sprite-image("sprites/logo.png")` (for Sass/SCSS/Compass).

Texticle exposes full text search capabilities from PostgreSQL, and allows you to declare full text indexes. Texticle will extend ActiveRecord with named_scope methods making searching easy and fun!

A time period and a job name are the only required parameters. Options may include an hour and minute to run for daily jobs. The job name is passed to your queueing system to enqueue a job, to be worked in one of your background job workers. (An important part of the lockless scheduler process pattern is that it never does any work itself, only queues up jobs for the workers to handle.) In order to make Clockwork queueing system-agnostic, the second bit of code you need is a small handler block that declares how to enqueue a job.

A lightweight, flexible library for Facebook with support for the Graph API, the old REST API, realtime updates, and OAuth validation.

Pyrite is a lightweight DSL around the Selenium browser testing framework.

Surveyor is a Rails gem plugin that lets you easily design surveys, questionnares, quizes, etc... and add them to your app.

Flexible authentication solution for Rails with Warden

Fallback when original attribute is not present or somethings not right.

Fast querying and expansion of recurrence rules in Ruby

Natural language parser for recurring events, based on Chronic.

Cells are like controllers in Rails - they have methods and corresponding views. However, their big advantage to controllers is their modularity: you can have as many cells on a page as you want.

Simple gem for working with currencies. It is extracted from the countries gem and contains all the currency information in the ISO 4217 standard.

Roo provides an interface to Open Office, Excel, and Google Spreadsheets.

Don't delete your records, move them to a different table

Delayed_paperclip is a rubygem that works with Paperclip and delayed_job. It allows you to easily process Paperclip attachments (such as resizing images) in the background with delayed_job.

An easy, automated CSS image sprite creator.

Automates efficient caching of your ActiveRecord collections, gives you counts for free and supports pagination. ARID Cache makes caching easy and effective. ARID cache supports caching on all your model named scopes, class methods and instance methods right out of the box. ARID cache prevents caching logic from cluttering your models and clarifies your logic by making explicit calls to cached result sets. ARID Cache is designed for handling large, expensive ActiveRecord collections but is equally useful for caching anything else as well.

PaperTrail lets you track changes to your models' data. It's good for auditing or versioning. You can see how a model looked at any stage in its lifecycle, revert it to any version, and even undelete it after it's been destroyed.

Setup.rb is the generic installer for ruby scripts and extentions. You can automate configuration and installation of your program package very easily with setup.rb simply by following a convention. And if you need more control, setup.rb also offers all the configuration you'll ever need.

This gem is a C binding to the excellent YAJL JSON parsing and generation library.

This is the Spatial Adapter for Rails 0.1.1. It is a plugin for Rails which manages the MySql Spatial and PostGIS geometric columns in a transparent way (that is like the other base data type columns). It also provides a way to manage these columns in migrations. It replaces both the "PostGIS Adapter for Rails" and "MySql Spatial Adapter for Rails" plugins.

Ruby library to convert from meters to miles from yards to fathoms from teaspoons to quarts and whatever else you could possibly want

Docsplit is a command-line utility and Ruby library for splitting apart documents into their component parts: searchable UTF-8 plain text, page images or thumbnails in any format, PDFs, single pages, and document metadata (title, author, number of pages...)

A uniquely powerful Ruby parser for Temporal Expressions. Type out your recurring time patterns in plain english, and the computer can understand it. Similar to Chronic?

Library for stubbing HTTP requests and setting expectations on HTTP requests in Ruby.

Generates docs on the fly for your favourite Ruby projects on GitHub, with DISQUS user comments

It will watch your queries while you develop your application and notify you when you should add eager loading (N+1 queries), when you’re using eager loading that isn’t necessary and when you should use counter cache.

Undo/Redo for Rails Models, including helpers to implement multi-level Undo/Redo, all in one plugin

TweetStream provides simple Ruby access to Twitter’s Streaming API (apiwiki.twitter.com/Streaming-API-Documentation).

Agile development tool that monitors a directory tree, and triggers a user defined action whenever an observed file is modified. Its most typical use is continuous testing, and as such it is a more flexible alternative to autotest.

A framework for creating e-books from Markdown/Textile text markup using Ruby. Using the Prince PDF generator, you'll be able to get high quality PDFs.

AuthHelpers is a collection of modules to improve your Authlogic models. It mainly exposes some convenience methods to help on confirmation and passwords management, it also deals automatically with associations and notifications.

The Bullet plugin is designed to help you increase your application’s performance by reducing the number of queries it makes. It will watch your queries while you develop your application and notify you when you should add eager loading (N+1 queries) or when you’re using eager loading that isn’t necessary.

A simple wrapper for background jobs.

I always get this error when trying to install the pg gem on Mac OS X Leopard. This command fixes the problem.

framework for Rspec matchers

Rails authentication library

Dynamically generated named_scope methods introspected from the database.

Weather.com XML API interface with support for forecasts.

Mix in a HTTP api wrapper

PDF generation library

Install the engineyard-backup gem for easy file backup with timestamps

"Blanket is a flexible backup framework designed to get the drudgery out of the way and to make automated backups easy."

Ruby gem to read the content of spreadsheet files

A machine learning library which implements ID3 (information gain) algorithm for decision tree learning. Currently supports continuous and discrete dataset learning and graphing.

Adds support for delegation of all missing methods to another object, and does a bit of dynamic method generation to reduce overhead for subsequent calls.