Integrate PostgreSQL's enumerated types with the Rails enum feature

Adds support for postgres arrays to ActiveRecord

This gem enables your model to query the database using the earthdistance extension. This should be much faster than using trigonometry functions over standart indexs.

Rescue from MySQL and Sqlite duplicate errors

Simple tagging gem for Rails using postgres array.

With Amountable, you can easily attach, organize and sum Ruby money fields to your models without migrating.

Extension for ActiveRecord that adds support for PostgreSQL array columns, mapping string values to integers.

An opinionated web framework build on web standards

CMS built on rails with love.

Give your models as-of date temporal extensions. Built entirely for PostgreSQL >= 9.4

Tracking exceptions for Rails application store them in database by exception_notification gem.

Ferry is a data migration and visualization command line tool rubygem that seeks to simplify the increasingly prevalent big data problems for developers

hydra_attribute is an implementation of EAV pattern for ActiveRecord models.

Organizes ActiveRecord models into a tree/hierarchy using a materialized path implementation based around PostgreSQL's ltree datatype. ltree's operators ensure that queries are fast and easily understood.

Store nested hashes and other types in ActiveRecord hstores

pg-eyeballs is a ruby gem that gives you detailed information about how the SQL queries created by the active record code you write are executed by the database. It gives you an easy, ruby friendly way to see the output of the Postgres EXPLAIN command and integrates with the popular query analysis tool gocmdpev

postgresql hstore parser/deparser - provides PgHstore.dump and PgHstore.load (aka parse)

Sync users and groups from LDAP to PostgreSQL

Organize ActiveRecord model into a tree structure using PostgreSQL LTree

Amazon Redshift _makeshift_ adapter for ActiveRecord 4.