find_by_param is a nice and easy way to handle permalinks and dealing with searching for to_param values

SQL-based data modeling for Rails applications and Postgres

This gem supports to get read/unread status (including read_at), read/unread users for a specific readable, etc.

rails middleware to reconnect connection

Recorder tracks changes of your Rails models

Dump statistics from Redis to DB

A Redis-based version-addressable caching system. Memoize pure functions, aggregated database queries, and 3rd party API calls.

Store application and user settings on Redis. Comes with ActiveRecord support.

A Redis-backed voting extension for Rails applications.

redshift_connector is a bulk data connector for Rails (ActiveRecord).

redshift-connector is a bulk data connector for Rails (ActiveRecord).

Better Rails Forms

Connection proxy for ActiveRecord for leader / replica setups.

master-slave replication helper for ActiveRecord

Record your rack/rails requests and store them for future inspection

A very basic reservation system using ActiveRecord

ResourceFull provides a fully-compliant ActiveResource server implementation built on ActionController. Additionally, it provides RESTful parameter queryability, paging, sorting, separation of controller concerns, multiple formats (HTML, XML, JSON), CRUD access permissions, and ...

Enable send_later support for Resque

Resque queue backed by database audits, with automatic retry

Roles solution for active-record-backed Rails 3 applications