Moderated fields or whole model instances are serialized and saved into a separate moderations table. The moderation can then be accepted and the changes will be applied to the model. This way, lookups for existing, accepted fields or entries will be much faster than if using something like Papertrail, since the changes that have not yet been accepted are stored outside of the model table - in the moderations table.

Calculate the horoscope of a person given the birth date and time

kindai.rb is kindai digital library downloader.

Kontrast is a testing tool that lets you build a frontend test suite to run against your test and production websites. It uses Selenium to take screenshots and ImageMagick to compare them. Kontrast then produces a detailed gallery of its test results.

Linkser is a link parser for Ruby. It gets an URI, tries to dereference it and returns the relevant information about the resource.

create meme images

A Ruby library for generating identicon. https://github.com/swdyh/quilt

A simple OMR tool

A Sinatra based server for quickly scaling and serving images. Nothing more.

Crops images based on entropy: leaving the most interesting part intact. Usefull for automatic cropping or resizing of images.

Create ascii art quine from image file

A Railtie that provides an asset management system for css, javascript, and sprites in your Rails applications and engines. ActiveAssets includes two libraries, ActiveExpansions and ActiveSprites. ActiveSprites generates sprites defined by a dsl similar to a route definition. Similarly, ActiveExpansions' dsl creates ActionView::Helpers::AssetTagHelper javascript and stylesheet expansions, and adds additional features

Programmatically generate beautiful header images for blogs or social media accounts.

Alula creates higly optimised static blogs while taking all the complexity and repeated tasks away from you.

Dead simple asset uploader attachments for your active record models

This plugin implements attachment storage and processing, integrated with ActiveRecord models and Ruby CGI/Rails-style uploads. Image processing operations including a number of different resizing & thumbnailing modes are provided, and the architecture simplifies clean implementation of other types of processing. Errors are carefully handled to minimize the possibility of broken uploads leaving incomplete or corrupt data. RMagick, MiniMagick, and ImageScience image processors are supported.

Barcodes is a RubyGem for creating and rendering common barcode symbologies.

Bizside is an utilities to assist building web application.

An engine for search-engine-optimized blog management.

Generates transparent PNG "bumpspark"-style sparklines. Use from Ruby directly or as a Rails helper generating an image tag w/ built-in data, as conceived by whytheluckystiff.