Provides haversine formula, implemented with Arel; which could be added to ActiveRecord scope, for instance.

Add index hint to MySQL query in Arel.

Operators (|, &, -) for ActiveRecord.

Provides trigonometry functions, implemented with Arel; which could be added to ActiveRecord scope, for instance.

Add support for creating `ENUM` types in PostgreSQL with ActiveRecord

Provides a simple way for defining enumerations in ActiveRecord models

ar_finder_form provides a DSL to define form for options to find/paginate

Arfy is just a snippet: some rake tasks and environment configuration to allow you use Rails migrations, without all the rails stack.

Package ActiveRecord suitable to include in other gem

acts_as_gold allows you to extend a model with money in the form of Gold, Silver and Copper, as seen in World of Warcraft

ActiveRecord Integrity checking tool

Allows for reverse indexing selected ActiveRecord models. Handles searching and return of objects

Tools for Interval columns for ActiveRecord

activerecord-import by jsonl, command line interface

ar_jdbc_pg_array includes support of PostgreSQL's int[], float[], text[], timestamptz[] etc. into ActiveRecord. You could define migrations for array columns, query on array columns.

ActiveRecord JSON serializer

Make left joins feel like first-class citizens in ActiveRecord.

Lookup tables using activerecord and array fields

Replace missing image files in your models with defaults.

Daemon for sending butches of emails via Amazon SES using ActiveRecord for storing messages. Handles daily quotas, max send rate.