An AST transformation framework.

well, I guess the description is not really optional

Toolkit for asymptotic analysis of functions

Simple ruby gem to provide an API for managing async processes

An Async AWS SDK adapter for `socketry/async` framework

iterate over enumerable objects concurrently

With EventEmitter you can build your application in Event-Driven way. It acts as global pub/sub mechanism and uses Sidekiq to reliably and asynchronously deliver messages to subscribers. Using this approach you can enforce low coupling between different components of the system.

An asynchronous experiment framework.

Provides a number of tools to help make developing and testing asynchronous applications more manageable.

Simple asynchronous jobs for Rails

User Messaging Async calls, compatible with Mongoid (Ruby on Rails) gem

Async paperclip uploader

Wait for completion of the asynchronous procedure to obtain thats results.

library of simple asynchronous utilities for ruby

Async resource pool for fibers.

Non-blocking transformation and image writing in Ruby, powered by VIPS.

Non-blocking zip reading and writing for Ruby.

Abstract runner with container-based parallelism using threads and processes where appropriate.

Asynchronous adaptors for Sequel.

Build Slack bots and use real time messaging.