OpenSearch - OpenSearch is a community-driven, open source search and analytics suite derived from Apache 2.0 licensed Elasticsearch 7.10.2 & Kibana 7.10.2. It consists of a search engine daemon, and a visualization and user interface, OpenSearch Dashboards.
Bandlab - Capture, nurture, and collaborate on song ideas in the cloud
Sphinx Search - Sphinx is an open source full text search server, designed with performance, relevance (search quality), and integration simplicity in mind. Sphinx lets you either batch index and search data stored in files, an SQL database, NoSQL storage.
Krue - Twitch for music: live streams from amazing musicians
Apache Lucene - High-performance, full-featured text search engine library written entirely in Java.
Vampr - Connect with musicians, industry & music lovers alike