HexaPDF is a pure Ruby library with an accompanying application for working with PDF files. In short, it allows creating new PDF files, manipulating existing PDF files, merging multiple PDF files into one, extracting meta information, text, images and files from PDF files, securing PDF files by encrypting them and optimizing PDF files for smaller file size or other criteria. HexaPDF was designed with ease of use and performance in mind. It uses lazy loading and lazy computing when possible and tries to produce small PDF files by default.

HexaPDF is a pure Ruby library with an accompanying application for working with PDF files. In short, it allows creating new PDF files, manipulating existing PDF files, merging multiple PDF files into one, extracting meta information, text, images and files from PDF files, securing PDF files by encrypting them and optimizing PDF files for smaller file size or other criteria. HexaPDF was designed with ease of use and performance in mind. It uses lazy loading and lazy computing when possible and tries to produce small PDF files by default.

Mailgun's Official Ruby SDK for interacting with the Mailgun API.

Server-Sent Events via Redis

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

Re:VIEW is a digital publishing system for books and ebooks. It supports InDesign, EPUB and LaTeX. This gem is experimental version with PEG grammar

UNIONs in ActiveRecord! Adds proper union and union_all methods to ActiveRecord::Relation.

In showing a long lists, sometimes one would prefer to see the value arranged aligned in columns. Some examples include listing methods of an object or debugger commands. See Examples in the rdoc documentation for examples.

Opensearch output plugin for Fluent event collector

This library can be used as a module for `fog` or as standalone provider to use vSphere in applications.

Rebuild your Jekyll site when a file changes with the `--watch` switch.

Grape instrumentation for the OpenTelemetry framework

Stripe webhook integration for Rails applications.

XSpear is XSS Scanner on ruby gems

Fast mime detection by extension or content in pure ruby (Uses freedesktop.org.xml shared-mime-info database)

An implementation of the JSON Schema specification. Provides automatic parsing for any given JSON Schema.

A pure Ruby library for event-driven IO

Puppet's accceptance testing harness

Benchmark::Trend will help you estimate the computational complexity of Ruby code by running it on inputs increasing in size, measuring their execution times, and then fitting these observations into a model that best predicts how a given Ruby code will scale as a function of growing workload.

Caxlsx_Rails provides an Caxlsx renderer so you can move all your spreadsheet code from your controller into view files. Partials are supported so you can organize any code into reusable chunks (e.g. cover sheets, common styling, etc.) You can use it with acts_as_caxlsx, placing the to_xlsx call in a view and adding ':package => xlsx_package' to the parameter list. Now you can keep your controllers thin!