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.

Announce capistrano deploys to slack

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

DataMapper adapter for the Redis key-value database

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.

Rails drop in for Varnish support.

This gem add the "deep merge" feature to class Hash. It means that if you want to merge hashes that contains other hashes (and so on...), those sub-hashes will be merged as well. This is very handy, for example for merging data taken from YAML files.

Calculates the haversine distance between two locations using longitude and latitude. This is done using Math formulas without resorting to Active Record or SQL DB functionality

A simple way to add honeypot captchas to Rails forms

This gem keep an eye on every Net::HTTP library usage and dump all request and response data to the log file

Kaminari views for Twitter Bootstrap (rails engine)

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+

sheets allows you to store and browse snippets of text from your command line.

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

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

gcm_on_rails is a Ruby on Rails gem that allows you to easily incorporate Google's 'Google Cloud Messaging for Android' into your Rails application. This gem was derived from c2dm_on_rails (https://github.com/pimeys/c2dm_on_rails) after Google deprecated C2DM on June 27, 2012