Simple, efficient background processing for Ruby
OmniAuth is a flexible authentication system utilizing Rack middleware
Handles sessions for Ruby web applications using DynamoDB as a backend
Simple, but flexible HTTP client library, with support for backends
Classy web-development dressed in a DSL
Rack middleware for blocking & throttling
A flexible framework for maintainable Ruby apps
Better error page for Rack apps
Ruby gem for building Telegram Bot with optional Rails integration
Web development IDE in browser, supports Java, ruby, javascript...etc