Combined reader/writer accessors in Ruby, ideal for chaining or DSLs. This is useful for when you want to expose a DSL to an external file (think Rakefile like setup) and want to hide the fact the code is actually running inside a class with a structure.

Provides a Ruby module that can be extended by a class in order to provide class methods for defining attributes. Attributable automatically generates accessor, equality, hash and inspect methods.

Builds macros to automatically manipulate your models' attributes.

Provides auto-serialization of simple Ruby types that databases do not support, such as symbols and classes.

A matcher for testing object attributes.

Date-granular history for specified model fields. Compact & easy to query.

A flowdown wrapper for attribute dependencies

Simple encryption-at-rest plugin for ActiveRecord.

Memoize attributes in a thread-safe way. This ruby gem adds a `#attr_memoized` class method, that provides a lazy-loading mechanism for initializing "heavy" attributes, but in a thread-safe way. Instances thus created can be shared among threads.

A Ruby client generator for JSON APIs described with a JSON schema

Provides advanced versions of Ruby's basic data types

Audio processing allows you to convert audio files or streams using a high level Ruby API.

Ubuntu applet that lets you switch audio sinks, toggle RTP sender and inputs. Depends on PulseAudio and libappindicator-dev.

Auditron tracks who changed what on any ActiveRecord model — storing only the fields that changed, not full snapshots. Ships with a chainable query DSL, built-in log retention, a simple actor lambda, and works with PostgreSQL, MySQL, and SQLite. Zero hard dependencies beyond ActiveRecord.

Adds audit tables and triggers for postgres databases

Uses created_by_user_id and updated_by_user_id to store the changes made to a record. This is limited to storing the user who created the record and the last user to update the record.

Given a glider racing task , a set of scoring rules and IGC file/s, Augen can calculate points for glider flights, similar to SeeYou and OLC.

Aurora is a clean, responsive Jekyll theme for GitHub Pages with immersive design

Auth1 is a Rails Engine for Auth0. Auth1 provides everything you need to use Auth0 in your Rails application.

Ruby SDK for Authensure - the electronic signature and document authentication platform. Provides a simple interface to create envelopes, manage documents, handle signatures, and integrate webhooks.