Ruby Commands based framework (aka service objects)

Generate component from collections of data points

Ruby Decorator based framework (aka decorator/presenter objects)

ActiveSupport::MessageEncryptor encryption wrapper for PORO objects and ActiveModel attributes

Build ActiveModel::Errors like errors in Ruby

Ruby Form based framework (aka form objects)

LiteLogger provides customizable log levels, formats, and destinations.

Convert measurements to different unit sizes or types

Cache and memoization helpers for ruby Ruby classes

Ruby Query based framework (aka query objects)

Access Redis with an ActiveRecord like ORM interface

Collection of mixins to regulate the state of a database record

Collection of mixins to control the state of a database record

Import and export Ruby and Rails objects to flat files and vice versa

Collection of useful Ruby methods for its primitive classes

Ruby Service Object (aka Commands) framework

Generate statistics from collections of data points

Generate or obfuscate Id's using different patterns

Collection of ActiveModel/ActiveRecord validators

Some of the bits around the edge of Habitat, that I wish were available natively.