Apache Solr

Apache Solr is an open-source Java search platform built on Apache Lucene. It helps teams turn scraped content into fast, searchable indexes with filters and facets.

Key Features:

• Lucene Search - Built on Apache Lucene for reliable full-text search over indexed content
• Faceted Navigation - Supports filters and facets for richer search experiences
• Scalable Indexing - Handles large scraped corpora for enterprise search workloads
• Open Source - Apache-2.0 licensed with source available in apache/solr
• Java Project - Java codebase with 1,630 GitHub stars and 839 forks