Ferret is a port of the Java Lucene project. It is a powerful indexing and search library.

Search for music metadata

A tiny full-text search engine by pure Ruby.

a flexible text-searching library built on top of redis

Finds any combination of dishes that add up exactly to the target price.

Sensu plugin to search files based on size

Dashboard to track your search engine rankings.

A lightweight API wrapper for the Bing Search API

Digs YUM repositories to search for RPM packages

A semantic offline search

tmb provides a command line interface to manage your textmate bundles, allowing you to search for new bundles on github, install them, and uninstall existing local bundles.

search scraping

torrentz.eu ruby client to search and download torrentz & magnets

Parser for github-style search.

Random Fortune and Google Search in One

Framework for periodically searching for terms on multiple services.

Ruby on Rails configurator and client to the Sphinx fulltext search engine.

Uninformed search trees!

Provide feature to search view files from your browser.

Elastictastic is an object-document mapper and lightweight API adapter for ElasticSearch. Elastictastic's primary use case is to define model classes which use ElasticSearch as a primary document-oriented data store, and to expose ElasticSearch's search functionality to query for those models.