Your API docs say you return an Array of Result objects, but do you really?

YARD plugin for documenting programs using the wires event routing framework for Ruby.

Object-relational mapper for Yahoo Query Language - A Object Relation Mapper for YQL in ruby, very similar to ActiveRecord 3.0.0 with chainability and lazy evaluation of queries

yarf means Yet Another Rails Fixture

Yargi provides a powerful mutable digraph implementation.

Pure Ruby graph algorithms, particularly e.g. Hamiltonian cycles

An extension for Rspec that merges the advantages of using Gherkin as a communication tool, without the need for Cucumber

I must assume that someone has already implmented Lisp in Ruby and thus I name this 'Yet Another Ruby Lisp"

YARMCL's Another Ruby Model Catalog Library

Yarnlock provides to parse/stringify yarn.lock file for Ruby

YARR. Yet Another Ruby REPL. A Ruby REPL (just a hobby, won't be big and professional like pry)

Yarrow is a tool for generating well structured documentation from a variety of input sources.

YARSPG is an YARS-PG reader/writer for the RDF.rb library suite.

Parse and access RSS/RDF/Atom feeds with a uniform interface.

Ruby YARV instructions are too "internal" and hard to access from outside. This gem was born aiming to provide a friendly way to access YARV instructions for Ruby developers

Yet Another Salesforce Dataloader

HTML scraping to write maintainable rules to extract data from HTML content.

Add and customize Yandex Share buttons to your Rails app

A pure Ruby serialization library that works across different Ruby implementations like Opal and JRuby as an alternative to YAML/Marshal.

One more Service Object pattern implementation