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 without hand-writing any boolean queries or building Solr parameters by hand.

Blacklight is an open source Solr user interface discovery platform. You can use Blacklight to enable searching and browsing of your collections. Blacklight uses the Apache Solr search engine to search full text and/or metadata.

ActiveFedora provides for creating and managing objects in the Fedora Repository Architecture.

GeoBlacklight provides a world-class discovery platform for geospatial (GIS) holdings. It is an open collaborative project aiming to build off of the successes of the Blacklight Solr-powered discovery interface and the multi-institutional OpenGeoportal federated metadata sharing communities.

Project Hydra Stack Dependencies

Fluentd input plugin to track insert/update/delete event from MySQL database server. Not only that, it could multiple table replication and generate nested document for Elasticsearch/Solr. It's comming support replicate to another RDB/noSQL.

The unofficial X-Ray Tracing SDK for Ruby.

A query/response extension lib for RSolr

A Ruby-on-Rails interface to Datastax Enterprise. Intended for use with the DSE search nodes.

Active Record caching and indexing in memcache.

Blacklight Advanced Search plugin

Allows delimited Solr facets to become hierarchical trees in Blacklight.

Contains classes to register objects and initialize workflows

Fluent output plugin for sending data to Apache Solr.

Shareable tools/components for building a digital collections app in Rails.

Ruby wrapper for the LucidWorks REST API

Easy manipulation of sets of ActiveRecord models

Easily integreate mongo mapper with enterprise search like solr

Provides asynchronous connections to Solr

A gem for indexing EAD into solr using OM. Define your own OM terminology to create the solr fields you want from your ead, then use Solr-based applications like Blacklight to search and display the results.