killthekitten

actionpack-xml_parser

XML parameters parser for Action Pack (removed from core in Rails 4.0)

active_admin

The administration framework for Ruby on Rails applications.

activeresource-response

:link: Extensions to ActiveResource library. The simpliest way for REST pagination.

arel

A Relational Algebra

awesome-datajournalism

Awesome list for data journalists and future data journalists

axlsx

xlsx generation with charts, images, automated column width, customizable styles and full schema validation. Axlsx excels at helping you generate beautiful Office Open XML Spreadsheet documents without having to understand the entire ECMA specification. Check out the README for some examples of how easy it is. Best of all, you can validate your xlsx file before serialization so you know for sure that anything generated is going to load on your client's machine.

bootstrap

The most popular front-end framework for developing responsive, mobile first projects on the web.

brakeman

A static analysis security vulnerability scanner for Ruby on Rails applications

cassaforte

Modern, high-level Clojure driver (client) for Cassandra build around CQL 3

filter_form

Build filter forms easily

grape

An opinionated micro-framework for creating REST-like APIs in Ruby.

guides-1

Documentation guides and tutorials for Clojure. Various authors.

helpers

View helpers for Ruby applications

hstore_ops

Better operator class for hstore: smaller index and faster @> queries.

pdfkit

A Ruby gem to transform HTML + CSS into PDFs using the command-line utility wkhtmltopdf

poltergeist

A PhantomJS driver for Capybara

query_trail

Shows a backtrace of your queries

remotipart

Rails jQuery file uploads via standard Rails "remote: true" forms.

rest-client

Simple HTTP and REST client for Ruby, inspired by microframework syntax for specifying actions.

rr

RR is a test double framework that features a rich selection of double techniques and a terse syntax.

rubyXL

Ruby lib for reading/writing/modifying .xlsx and .xlsm files

show_for

Wrap your objects with a helper to easily show them

simple_enum

Simple enum-like field support for ActiveModel (including validations and i18n)

simple_form

Forms made easy for Rails! It's tied to a simple DSL, with no opinion on markup.

slim-rails

Slim templates generator for Rails 3 and 4

squasher

Squasher - squash your old migrations in a single command

truefactor-ruby

Truefactor ruby gem and integration documentation

vx-promo

write_xlsx

Rubygem for create excel xlsx file

xlsx_writer

Writes XLSX files. Simple, clean XML and style. Supports autofilters and headers/footers with images and page numbers if you're willing to do a little Excel hacking.