Poltergeist is a driver for Capybara that allows you to run your tests on a headless WebKit browser, provided by PhantomJS.

Wraith is a screenshot comparison tool, created by developers at BBC News.

Command line tool and ruby interface to optimize (lossless compress, optionally lossy) jpeg, png, gif and svg images using external utilities (advpng, gifsicle, jhead, jpeg-recompress, jpegoptim, jpegrescan, jpegtran, optipng, oxipng, pngcrush, pngout, pngquant, svgo)

Re:VIEW is a digital publishing system for books and ebooks. It supports InDesign, EPUB and LaTeX.

Process your attachments with FFMPEG

Ruby library to provide server side functionality for elFinder. elFinder is an open-source file manager for web, written in JavaScript using jQuery UI.

ImageInfo finds the size and type of a single or multiple images from the web by fetching as little as needed.

Mayu Live is a live updating server side VirtualDOM framework for Ruby, inspired by modern frontend tools that exist in the JavaScript ecosystem.

GNOME application for managing collections of books

Teardown tool for ipa, apk, aab, hap mobile files and Windows, macOS and dSYM file, even support for info.plist and .mobileprovision files

A library which implements the client VNC protocol to control VNC servers.

Support to help you develop Zendesk Apps.

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 ty...

Optimize (lossless compress, optionally lossy) images (jpeg, png, gif, svg) using external utilities (advpng, gifsicle, jhead, jpeg-recompress, jpegoptim, jpegrescan, jpegtran, optipng, pngcrush, pngout, pngquant, svgo)

metanorma-m3d lets you write M3AAWG Documents (M3D) in AsciiDoc syntax. This gem is in active development. Formerly known as asciidoctor-m3d.

Allows the user to easily sideload, package, deeplink, test, roku apps.

Generate icon for iOS, Android

Analysis tool for iOS ipa and Android apk.

asciidoctor-csand lets you write CSA Normal Documents (CSAND) in AsciiDoc syntax. This gem is in active development.

asciidoctor-m3d lets you write M3AAWG Documents (M3D) in AsciiDoc syntax. This gem is in active development.