Rack provides a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between (the so-called middleware) into a single method call.

Rack::Test is a small, simple testing API for Rack apps. It can be used on its own or as a reusable starting point for Web frameworks and testing libraries to build on.

Erubi is a ERB template engine for ruby. It is a simplified fork of Erubis

The Database Toolkit for Ruby

ruby-warning adds custom processing for warnings, including the ability to ignore specific warning messages, ignore warnings in specific files/directories, include backtraces with warnings, treat warnings as errors, deduplicate warnings, and add custom handling for all warnings in specific files/directories.

Routing tree web toolkit

A session implementation for Rack.

A message bus for rack

Rodauth is Ruby's most advanced authentication framework, designed to work in all rack applications. It's built using Roda and Sequel, but it can be used as middleware in front of web applications that use other web frameworks and database libraries. Rodauth aims to provide strong security for password storage by utilizing separate database accounts if possible on PostgreSQL, MySQL, and Microsoft SQL Server. Configuration is done via a DSL that makes it easy to override any part of the authentication process. Rodauth supports typical authentication features: such as login and logout, changing logins and passwords, and creating, verifying, unlocking, and resetting passwords for accounts. Rodauth also supports many advanced authentication features: * Secure password storage using security definer database functions * Multiple primary multifactor authentication methods (WebAuthn and TOTP), as well as backup multifactor authentication methods (SMS and recovery codes). * Passwordless authentication using email links and WebAuthn authenticators. * Both standard HTML form and JSON API support for all features.

American style month/day/year date parsing for ruby 1.9+

minitest-hooks adds around and before_all/after_all/around_all hooks for Minitest. This allows you do things like run each suite of specs inside a database transaction, running each spec inside its own savepoint inside that transaction, which can significantly speed up testing for specs that share expensive database setup code.

Forme is a forms library with the following goals: 1) Have no external dependencies 2) Have a simple API 3) Support forms both with and without related objects 4) Allow compiling down to different types of output 5) Integrate easily into web frameworks

Refrigerator freezes all core classes. It is designed to be used in production, to make sure that none of the core classes are modified at runtime. It can also be used to check libraries to make sure that they don't make unexpected modifications/monkey patches to core classes.

Sequel/ActiveRecord fixture loader that handles dependency graphs

Database enforced timestamps, immutable columns, counter/sum caches, and touch propogation

AutoForme is an web administrative console for Sequel::Model that supports Roda, Sinatra, and Rails. It offers the following features: * Create, update, edit, and view model objects * Browse and search model objects * Edit many-to-many relationships for model objects * Easily access associated objects * Support autocompletion for all objects * Allow customization for all likely configuration points, using any parameters available in the request

Rack::Unreloader is a rack middleware that reloads application files when it detects changes, unloading constants defined in those files before reloading.

by is a library preloader for ruby designed to speed up process startup. It uses a client/server approach, where the server loads the libraries and listens on a UNIX socket, and the client connects to that socket to run processes. For each client connection, the server forks a worker process, which uses the current directory, stdin, stdout, stderr, and environment of the client process. The worker process then processes the arguments provided by the client. The client process waits until the worker process closes the socket, which the worker process attempts to do right before it exits.

RDoc generator designed with simplicity, beauty and ease of browsing in mind

sequel-annotate annotates Sequel models with schema information. By default, it includes information on columns, indexes, and foreign key constraints for the current table. On PostgreSQL, this includes more advanced information, including check constraints, triggers, comments, and foreign keys constraints for other tables that reference the current table.