Opal is a Ruby to JavaScript compiler. It is source-to-source, making it fast as a runtime. Opal includes a compiler (which can be run in any browser), a corelib and runtime implementation. The corelib/runtime is also very small.

HTTP Accept, Accept-Charset, Accept-Encoding, and Accept-Language for Ruby/Rack

Rack middleware to force SSL/TLS.

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

Feature flag API for the Flipper gem

Markdown TaskList components

Shrine is a toolkit for file attachments in Ruby applications. It supports uploading, downloading, processing and deleting IO objects, backed by various storage engines. It uses efficient streaming for low memory usage. Shrine comes with a high-level interface for attaching uploaded files to database records, saving their location and metadata to a database column, and tying them to record's lifecycle. It natively supports background jobs and direct uploads for fully asynchronous user experience.

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

EventMachine based, async HTTP Request client

Apartment allows Rack applications to deal with database multitenancy through ActiveRecord

Contributed Rack Middleware and Utilities

An Action Dispatch session store backed by an Active Record class.

Rack::Cache is suitable as a quick drop-in component to enable HTTP caching for Rack-based applications that produce freshness (expires, cache-control) and/or validation (last-modified, etag) information.

Heavy metal SOAP client that can accept adapter option

A framework for pulling together an overview of data that is important to your team and displaying it easily on TVs around the office. You write a bit of ruby code to gather data from some services and let Smashing handle the rest - displaying that data in a wonderfully simple layout. Built for developers and hackers, Smashing is highly customizable while maintaining humble roots that make it approachable to beginners.

Standards-compliant WebSocket server and client

Wrapper for Pusher Channels REST api: : https://pusher.com/channels

OmniAuth strategy for Twitter

LicenseFinder works with your package managers to find dependencies, detect the licenses of the packages in them, compare those licenses against a user-defined list of permitted licenses, and give you an actionable exception report.

google-cloud-debugger is the official library for Stackdriver Debugger.