Type system for Ruby supporting coercions, constraints and complex types like structs, value objects, enums etc

Predicate logic with rule composition

A mixin to add configuration functionality to your classes

Hanami is a web framework for Ruby

Validation library

dry-schema provides a DSL for defining schemas with keys and rules that should be applied to values. It supports coercion, input sanitization, custom types and localized error messages (with or without I18n gem). It's also used as the schema engine in dry-validation.

Typed structs and value objects

Common monads for Ruby

Repository abstraction for rom-rb

rom-changeset adds support for preprocessing data on top of rom-rb repositories

Persistence and mapping toolkit for Ruby

Container-agnostic automatic constructor injection

Business Transaction Flow DSL

Pub/sub system

Organize your code into reusable components

Flexible, expressive pattern matching for Ruby

SQL databases support for ROM

Monitoring and instrumentation APIs

A complete, standalone view rendering system that gives you everything you need to write well-factored view code

Hanami utilities