Oracle "enhanced" ActiveRecord adapter contains useful additional methods for working with new and legacy Oracle databases. This adapter is superset of original ActiveRecord Oracle adapter.

Poor man's search engine module for Rails3 (Arel)

Parse Cappuccino Literal predicated and sort descriptors to arel expressions

This is a very simple framework to create small frontends in a webserver

Reporter adds a consistent way to build reports.

A RGeo PostGIS extension to provide Active Record (Model) clustering functionality

MetaWhere offers the ability to call any Arel predicate methods (with a few convenient aliases) on your Model's attributes instead of the ones normally offered by ActiveRecord's hash parameters. It also adds convenient syntax for order clauses, smarter mapping of nested h...

sportweb - instant open sports web admin browser command line tool

This module implement [to_spreadsheet | xls] to ActiveRecord::Relation

A Ruby client for sqlcached

Databases on Rails. Build a persistent domain model by mapping database tables to Ruby classes. Strong conventions for associations, validations, aggregations, migrations, and testing come baked-in.

Covert SQL back to an AST so you can modifications to the AST.

Tramp provides asynchronous ORM layer.

Perform weighted averages, even across associations. Rails 3 only because it uses ARel.

Wherewolf allows you to consume search terms as strings without worrying about database injections. It parses the query and converts it into ARel. It's great for creating filterable REST APIs.