Surus accelerates ActiveRecord with PostgreSQL specific types and functionality. It enables indexed searching of serialized arrays and hashes. It also can control PostgreSQL synchronous commit behavior. By relaxing PostgreSQL's durability guarantee, transaction commit rate can be increased by 50% or more.

Easily run queries on shard and replica databases.

Save migrations and columns by storing multiple booleans in a single integer

Use deep_pluck as a shortcut to select one or more attributes and include associated models without loading a bunch of records. And DRY up your code when using #as_json.

Execute your ActiveRecord migrations with Percona's pt-online-schema-change. Formerly known as Percona Migrator.

Adds typed hstore backed fields to an ActiveRecord model.

A Rails generator that generates Rails I18n locale files with automatic translation for almost every known locale.

Irwi is Ruby on Rails plugin which adds wiki functionality to your application.

Migrate large tables without downtime by copying to a temporary table in chunks. The old table is not dropped. Instead, it is moved to timestamp_table_name for verification.

A fast, safe, simple direct SQL executor for PG

Generated scopes for ActiveRecord classes.

A Rails interface for Intuit's Quickbooks Web Connector that's OPEN SOURCE!

ruby-plsql gem provides simple Ruby API for calling Oracle PL/SQL procedures. It could be used both for accessing Oracle PL/SQL API procedures in legacy applications as well as it could be used to create PL/SQL unit tests using Ruby testing libraries.

Database-backed Rails error subscriber

ActiveRecord extension which adds typecasting to store accessors

Extends ActiveRecord::Store.store_accessor

ActiveRecord migration helpers to avoid downtime

ActsAsBookable is a reservation engine for Rails applications that allows resources to be booked. You can define availability rules for bookable models and set costraints to implement different types of booking (hotels, theaters, meeting rooms...)

acts_as_favoritor is a Rubygem to allow any ActiveRecord model to associate any other model including the option for multiple relationships per association with scopes. You are able to differentiate followers, favorites, watchers, votes and whatever else you can imagine through a single relationship. This is accomplished by a double polymorphic relationship on the Favorite model. There is also built in support for blocking/un-blocking favorite records as well as caching.

Make user messageable!;-)