The simplest way to handle the primary or default flag to your models.

Settler can be used for defining application wide settings in Rails. Settings are loaded from a YAML file and stored in the database using ActiveRecord to allow users to update settings on the fly. The YAML configuration allows you to not only specify defaults, but setting value validations and t...

SexItUp allows for the easy drop-in of public domain images for site mockups and user avatars.

Run your own url shortener add your own web address for free on Heroku.com

Provides Reform integration for Shrine.

Publisher for enqueuing jobs to Sidekiq

Transactional job push for Sidekiq with jobs staged in the database

A simple observer implementation for POROs (Plain Old Ruby Object) and ActiveRecord objects.

A simple authentication system for Rails apps

Simple Hstore Accessor extension for Rails 3

simple_nested_set allows to easily handle nested sets in ActiveRecord

SQL with a simple interface. Postgres only.

Ruby on Rails plugin that automatically notifies Google, Bing, and Yahoo of changes to your models, i.e. changes to your sitemap.

Connection proxy for ActiveRecord for master / replica setups.

Instant change of connection in rails application.

Very simple automatic generation and saving nested attributes of models from html form. ActiveModel.

This plugin allows models to generate a unique "slug" (url-enabled name) from any regular attribute. Add friendly URLs to your models with one line.

Slugger is yet another slug generator.

Easy slug functionality

SO2DB provides an API for building StackOverflow data dump importers. It ships with a PostgreSQL implementation and binary.