A safe way to accept user parameters and query against your ActiveRecord Models

Ruby library for integrating with the 42Floors MLS

Adds a #sort query method to ActiveRecord that turns whitelisted user-supplied parameters into ORDER BY clauses -- ordering by columns or associations, ascending/descending, with NULLS handling and random ordering -- without exposing you to SQL injection.

PostgreSQL Full Text Search for Active Record and Rails

A library for interacting with REST APIs. Similar to ActiveResource