Ruby/Odeum is a simple full text reverse indexer that lets you index a set of files and then search through them very quickly.

Ruby wrapper for loklak.org API - distributed tweet search server

A tiny command line utility to search through Rails server log files and display requests that meet certain criteria.

A Ruby object-oriented search library for directed and undirected graphs based loosely on Dijkstra's algorithm

Tire is a Ruby client for the CSDNSearch search engine/database.

Scrapes data from Scryfall.com to search for and display info about MTG cards

Ransack search form using SimpleForm

Search and count emails from a text file, Ex. MailMapper.find("source", option=int); option 0 «default value» returns a hash with domain-key counter-value, option 1 returns a hash for user@mail -> counter-value, option 2 returns an array with all mails

Serves documentation for installed gems locally on HTTP, with full text search

This utility/library search mathematical reviews sites and fetches metadata about articles. It can return results as one of text, xml, html, yaml, json or ruby formats.

A Rubyish API client for Endeca's MDEX search engine, using the XQuery API

Meshcomplete is a Ruby on Rails engine for MeSH autocomplete search box built with jQuery UI.

Lableb cloud search api sdk

Meta tags helpers for search engine optimization of Rails application

metal-archives provides an interface to search for album releases for a specific year, defaulting to the current one if none is provided.

Migemo is a tool for Japanese incremental search. It makes Japanese character regular expression from alphabet and optimize them.

Anngler is an approximate nearest neighbor search for points in n-dimensional space that are close in terms of cosine distance to a given point. The gem is built with serverless architecture in mind with Redis but it also offers a local in-memory storage.

Search API for craigslist

Extends couchrest_model to provide support for creating and querying Cloudant Search indexes.

A library for working with LC/MS runs. Part of mspire. Has parsers for mzXML v1, 2, and 3, mzData (currently broken) and mzML (planned). Can convert to commonly desired search output (such as mgf). Fast random access of scans, and fast reading of the entire file.