charlock_holmes provides binary and text detection as well as text transcoding using libicu

Official Twilio SendGrid Gem to Interact with Twilio SendGrids API in native Ruby

JSON Schema validator. Supports drafts 4, 6, 7, 2019-09, 2020-12, OpenAPI 3.0, and OpenAPI 3.1.

ActiveModel/Record integrations for Elasticsearch.

Persistence layer for Ruby models and Elasticsearch.

Ruby on Rails integrations for Elasticsearch.

rqrcode_core is a Ruby library for encoding QR Codes. The simple interface (with no runtime dependencies) allows you to create QR Code data structures.

Light weight job scheduling on top of Resque. Adds methods enqueue_at/enqueue_in to schedule jobs in the future. Also supports queueing jobs on a fixed, cron-like schedule.

The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web. http://getbootstrap.com

Implementation of [JSON Patch][1] and [JSON Pointer][2] RFC.

A Ruby DSL builder for Elasticsearch

This gem provides a mitigation against CVE-2015-9284 (Cross-Site Request Forgery on the request phrase when using OmniAuth gem with a Ruby on Rails application) by implementing a CSRF token verifier that directly utilize `ActionController::RequestForgeryProtection` code from Rails.

Einhorn makes it easy to run multiple instances of an application server, all listening on the same port. You can also seamlessly restart your workers without dropping any requests. Einhorn requires minimal application-level support, making it easy to use with an existing project.

A Toml parser using Citrus parsing library.

A nifty gem, in pure Ruby, to parse PDF files and combine (merge) them with other PDF files, number the pages, watermark them or stamp them, create tables, add basic text objects etc` (all using the PDF file format).

Use the GraphiQL IDE for GraphQL with Ruby on Rails. This gem includes an engine, a controller and a view for integrating GraphiQL with your app.

Adds support for creating state machines for attributes on ActiveRecord

Rack middleware to measure production code usage (LOC runtime usage)

Death to haphazard monkey-patching! Extend Minitest through simple hooks.

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