Decode iTunes OS X and iOS receipts without remote server-side validation by using the Apple Inc Root Certificate.

Gives you methods to mitigate long conditionals

The Jaccard Coefficient Index is a measure of how similar two sets are. This library makes calculating the coefficient very easy, and provides useful helpers.

JapaneseAddressParser is a Ruby gem that parses Japanese address. To detect the address, it uses geolonia/japanese-addresses (https://github.com/geolonia/japanese-addresses) CSV data.

Jekyll Asset Pipeline reborn adds asset preprocessing (CoffeeScript, Sass, Less, ERB, etc.) and asset compression / minification / gzip (Yahoo YUI Compressor, Google Closure Compiler, etc.) to Jekyll.

Jcrop asset bundle for Rails

jekyll plugin that makes available the first image of a post in the template

A plugin to read '_config.yml' and data files within Jekyll theme-gems

A Jekyll plugin with support for Blockdiag, Erd, GraphViz, Mermaid, Nomnoml, PlantUML, Svgbob, Syntrax, Vega, Vega-Lite and WaveDrom.

A liquid tag for Jekyll that generates <figure> elements.

Automate letsencrypt renewals for gitlab pages.

Image generator for Jekyll 3 websites that automatically convert images from one format to another.

Adds a liquid tag you can use to do server-side rendering of latex math using KaTeX

A full-feature electronic lab notebook theme/engine for Jekyll

An administrative framework for Jekyll sites, Jekyll Manager is essentially Jekyll Admin repackaged with some alterations.

MaterialDocs is a material two-column Jekyll theme designed for documentation websites.

Let Jekyll convert your Ruby into JavaScript using Opal.

A Jekyll Plugin that generates a JSON file with data for all the Pages in your Site.

Contains a Jekyll plugin and associated files that facilitate adding client-side search features to a site using the jekyll_pages_api gem.

A Jekyll markdown converter that uses Pandoc (via the pandoc-ruby gem).