Spice up your vanilla rails app with some SPA like benefits without the added complexity of a client-side JavaScript framework. From within javascript, there is no straightforward way (at least I'm aware of) to invalidate/reload a partial. Articles describing techniques such as this one have ...

Great for building APIs & reports

PDF printer

A lightweight gem to facilitate use of image placeholders from placehold.it

Decorator to help with the boilerplate of using Rails helpers. It gently wraps your classes to keep your views fresh.

Plinth - basic framework

Authorization control

A ruby bridge library for shared garcon/soleil code

Plain Old Ruby Template KML handler

Plain Old Ruby Template PLIST handler

Harness the power of PostgreSQL when crafting JSON reponses

Generates attr_accessors that encrypt and decrypt attributes transparently

This gem provides a lightweight library that simplifies the controllers of your resources in a Rails application. It offers a set of intuitive and convenient methods for handling common CRUD operations, including creating, reading, updating, and deleting resources.

Preserve is a Rails plugin which stores selected parameters in the session to make them available in subsequent requests.

Log in as another user in Rails - with extra features

Build forms with Primer markup using Rails form builders.

PrintOS gem that wraps the API.

Progstr Filer is a developer-friendly file and attachment hosting service that lets you easily build apps that store and share files.

project_honeypot_rails provides integration between project_honeypot and rails 3 to prevent suspicious IP to access your website

Exception reporting service for ProjectLocker