Roar provides object-oriented representers to define nested REST API documents which can be rendered and parsed. Roar-contrib adds some useful extensions.

Pagination support for RocketPants.

Plugin to integrate Will Paginate with the Roda framework

Search for artists, albums and tracks with Deezer API

A pagination library for Merb that uses will_paginate internally

Ruby Rails Rules Engine Framework : R3EF

Simple SAAS through Authorize.net

Blog CMS for Rails 3

A concise and easy-to-use Ruby library that connects ActiveRecord to the Sphinx search daemon, managing configuration, indexing and searching - forked and gemified for sayso

Core

Haiku Descriptions What is their reason after all? Oh, of course, its none.

SES Machine description

"A Rails gallery engine. Includes creating multiple galleries and photos. Multi uploading and cropping. Can extend gallery and photo model or controller. Configurable through yml configuration file."

Tracks jobs enqueued, average duration and etc.

Datatable Ruby gem for Rails.

Simple forum distributed as Rails mountable engine.

A library for integrating SimpleJsonapi into a Rails application.

This gem provides simple pages with rails engine

Simple hash-based search for ActiveRecord. Also see Scoped Search.

Simple content service