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

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.

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.

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

Ruby API for Mercurial DVCS.

Ruby implementation of Naive Bayes that generates true probabilities per class, works with many token types, and provides lots of bells and whistles while being optimized for performance.

Web page speed optimizations at the Rack level

Web page speed optimizations at the Rack level

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.

ZFS admin scripts, such as automatic snapshots, mysql snapshotting, scrubbing, etc.

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.

An awesome, flexible, powerful, useful, tricky and liar Rails 3 recommendations engine.

DataMapper plugin providing support for aggregates on collections

DataMapper plugin constraining relationships

File attachments as attributes for DataMapper, based on the original Paperclip by Jon Yurek at Thoughtbot

DataMapper plugin for magical timestamps