A toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Rich support for multibyte strings, internationalization, time zones, and testing.

Protocol Buffers are Google's data interchange format.

Provides swappable XML backends utilizing LibXML, Nokogiri, Ox, or REXML.

Really simple JSON and XML parsing, ripped from Merb and Rails.

The fastest JSON parser and object serializer.

The Database Toolkit for Ruby

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

XML to Hash translator

Font Metrics Parser for the Prawn PDF generator

Facebook OAuth2 Strategy for OmniAuth

A gem that provides a client interface for the Sentry error logger

Sunspot is a library providing a powerful, all-ruby API for the Solr search engine. Sunspot manages the configuration of persistent Ruby classes for search and indexing and exposes Solr's most powerful features through a collection of DSLs. Complex search operations can be performed w...

All the stuff that isn't good/big enough for a real library.

Get memory usage of a process in Ruby

As of version 0.6.0, only Microsoft Excel compatible spreadsheets are supported

google-cloud-bigquery is the official library for Google BigQuery.

google-cloud-firestore is the official library for Google Cloud Firestore API.

JSON Schema validator. Supports drafts 4, 6, 7, 2019-09, 2020-12, OpenAPI 3.0, and OpenAPI 3.1.

Sync Postgres data between databases

Cucumber Expressions - a simpler alternative to Regular Expressions