With it you can add the ability to create columns outside the default schema, directly in your model in a similar way that you just know in others projects like DataMapper or MongoMapper.

A faster, lower-memory, fuller-featured querying API for ActiveRecord that returns results as unadorned, read-only objects.

Push your Active Record models' scopes up to the surface

RoleCore is a Rails engine which could provide essential industry of Role-based access control.

#set(), speed-up your specs

Mine remote data into your ActiveRecord models. You can also perform associations and convert units.

Database-backed Rails error subscriber

Log transitions on a state machine to support auditing and business process analytics.

Set transaction isolation level in the ActiveRecord in a database agnostic way. Works with MySQL, PostgreSQL and SQLite as long as you are using new adapters mysql2, pg or sqlite3. Supports all ANSI SQL isolation levels: :serializable, :repeatable_read, :read_committed, :read_uncommitted.

Universal ID opens the flood gates with a deluge of profoundly powerful yet easily implemented new use-cases for your apps and scripts.

Bit array for ActiveRecord

Allows the use of CockroachDB as a backend for ActiveRecord and Rails apps.

ActiveRecord Tableless Models provides a simple mixin for creating models that are not bound to the database. This approach is useful for taking advantage of the features of ActiveRecord such as validation, relationships, etc.

acts_as_xlsx lets you turn any ActiveRecord::Base inheriting class into an excel spreadsheet. It can be added to any finder method or scope chain and can use localized column and sheet names with I18n.

A Rails library for storing user sessions in a backend database

Auto-create models, views, controllers, and routes with this slick Rails extension

Chamber lets you source your Settings from an arbitrary number of YAML files and provides a simple mechanism for overriding settings from the ENV, which is friendly to how Heroku addons work.

A malware/botnet analysis framework written in Ruby.

Stores draft versions of your ActiveRecord models' data in a single table or split up into separate tables. Works with Ruby on Rails and Sinatra.

FortyFacets lets you easily build explorative search interfaces based on fields of your active_record models.