Reduce CSS file size by removing unused selectors with PurgeCSS in Rails asset pipeline.

Push ActiveModel changes to Backbone Collections and Models though a Faye Pub/Sub server.

Rails engine to manage device tokens and push messaging.

Send model updates to Pusher

A Rails engine for handling PubSubHubbub subscriptions.

Library for planning and sending Push-Notifications on iOS, Android and Web

A Ruby on Rails gem that integrates Entropi Software's Pushpop framework

The core engine for PushType CMS. Required by all other PushType engines. PushType is a new generation of content management system for Ruby on Rails.

A set of RESTFul API methods to return information from beanstalk as well as control some behavior.

Provides HL7/MDS inbound services to a Rails application.

This gem helps you generate, validate, and manage Progressive Web App (PWA) manifests in your Rails application, with advanced configuration, validation, and generator support. See https://github.com/Dandush03/pwa_manifest_generator for details.

Password hardening using an oblivious-PRF service

LtiProvider is a mountable engine for handling the LTI launch and exposing LTI parameters in your rails app.

CanvasOauth is a mountable engine for handling the oauth workflow with canvas and making api calls from your rails app.

Rails Engine. a mini forum provided by only a simple helper, written in Backbones.js.

QAuthRubyClient can be mounted into any Q-App to deal with all q-apps services like authentication

Rails plugin to use Intuit's Official QuickBooks Online Buttons in SVG format.

Rails engine that provides QuickBooks Online API error handling.

Qbrick is a Rails engine that offers a simple CMS.

Official Qiita:Team Services Integration