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.

Hyrax is a featureful Hydra front-end based on the latest and greatest Hydra software components.

Sufia extends the robust Hydra framework to provide a user interface around common repository features and social features. Sufia offers self-deposit, proxy deposit, and configurable mediated deposit workflows. Sufia delivers its rich and growing set of features via a modern, responsive UI

Enable librarians, curators, and others who are responsible for digital collections to create attractive, feature-rich websites that feature these collections.

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.

Hydra-Head is a Rails Engine containing the core code for a Hydra application.

Blacklight Range Limit plugin

Provides a set of uniform RESTful routes to query any controlled vocabulary or set of authority terms.

A Blacklight-based environment to support discovery and delivery for archives and special collections

MARC support for Blacklight

A IIIF image server

Gallery display for Blacklight

A basic metadata editor for hydra-head

This gem provides an interface to transcoding services such as Ffmpeg, Amazon Elastic Transcoder, or Zencoder.

A devise extension for remote user authentication.

Rails engine to do user roles in an RDBMS for hydra-head

OpenSeadragon is a javascript library for displaying tiling images. This gem packages those assets and some Rails helpers for using them

A Rails engine supporting discovery of web archives.

Noid identifier services for ActiveFedora-based applications.

Annotot. Open annotations in Rails.