Save time and headaches, and create a more easily maintainable set of pages, with ActiveScaffold. ActiveScaffold handles all your CRUD (create, read, update, delete) user interface needs, leaving you more time to focus on more challenging (and interesting!) problems.

Generates brazilian CPF and CNPJ numbers for use in testing. Great to be used alongside Faker and won't clutter your namespace.

Keep track of error rates using redis. Degrade functionality if they're too high.

Integrate DataMapper with Rails 3

Govkit lets you quickly get encapsulated Ruby objects for common open government APIs. We're starting with Sunlight's Open States API and the Project Vote Smart API.

ActiveMessaging is an attempt to bring the simplicity and elegance of rails development to the world of messaging. Messaging, (or event-driven architecture) is widely used for enterprise integration, with frameworks such as Java's JMS, and products such as ActiveMQ, Tibco, IBM MQSeries, etc. Now supporting Rails 3 as of version 0.8.0.

Rails drop in for Varnish support.

A simple way to add honeypot captchas to Rails forms

Kaminari views for Twitter Bootstrap (rails engine)

Ruby bindings for LZ4. LZ4 is a very fast lossless compression algorithm.

If the user clicked through from an affiliated site, this middleware will track affiliate tag, referring url and time.

Simple gem to translate routes in Rails 3.x based on translate_routes

A modern fast tagging framework for Rails 3.1+

An AES encrypt/decrypt gem built ontop of OpenSSL. Not as quick as FastAES, but it doesn't require building native extensions and supports Base64 encoded input and output.

Load CSS and JS faster. Minifies, bundles, and optimizes CSS/JS assets ahead of time (e.g., on deploy), not at runtime. Loads popular third-party JS (like jQuery, YUI, and Dojo) from localhost in development, and auto-switches to Google's CDN in production. Lets you switch on LABjs mode to load more scripts in parallel. Can rewrite stylesheets to use CDN hosts (not just your web server) and cache-busting hashes for updated images.

Unobtrusive in place editing, using jEditable; only works in Rails 3

Announce capistrano deploys to slack

Centralized logging for rails apps using MongoDB. The idea and the core code is from http://github.com/peburrows/central_logger

DataMapper plugin providing support for aggregates on collections

DataMapper adapter for the Redis key-value database