An implementation of the Rack protocol/specification.

Capture webhooks and send HTTP requests locally. Think webhook.site meets Postman, but living on your machine where it belongs.

VSM is a small Ruby framework for building agentic systems using a Viable System Model–style architecture. It gives you Capsules: self‑contained components composed of five named systems (Operations, Coordination, Intelligence, Governance, Identity) plus an async runtime so many capsules can run concurrently.

ActiveMatrix is a comprehensive Rails-native Matrix SDK that enables developers to build sophisticated multi-agent bot systems and real-time communication features. This gem provides deep Rails integration with ActiveRecord models, state machines for bot lifecycle management, multi-tiered memory systems, intelligent event routing, connection pooling, and built-in inter-agent communication. Perfect for building chatbots, automation systems, monitoring agents, and collaborative AI systems within Rails applications. Features include command handling, room management, media support, end-to-end encryption capabilities, and extensive protocol support (CS, AS, IS, SS).

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

Ruby's favorite feed auto-discovery tool

Client and server implementation for gRPC using Async.

A HTTP request and response capture.

async client for polygon.io

A native library implementing the W3C WebDriver client specification.

Provides an async-http based send handler for aws-sdk-core.

Automatically modernize parts of your project/gem.

Litmus-like library focusing on CEM Acceptance Tests

Simple Web Crawler

Crawlr is a modern Ruby web scraping framework built for respectful and efficient data extraction. Features async HTTP requests, robots.txt compliance, cookie management, proxy rotation, flexible CSS/XPath selectors, and comprehensive error handling. Designed for both simple scraping tasks and complex, large-scale data extraction projects.

Supports HTTP/2, HTTP/1.X, HTTP proxying, connection pooling, concurrent requests, and lots more

DiscordRDA (Ruby Development API) is a modern, scalable Ruby library for Discord bot development

Discord.rb (not to be confused with discordrb) is a Ruby library that allows you to interact only with the Discord API. The library is still in development, but really simple tasks can be done.

Fluentd is an open source data collector designed to scale and simplify log management. It can collect, process and ship many kinds of data in near real-time.

Easy way tp access data from finviz.com.