* [pg_bm25](https://github.com/paradedb/paradedb/tree/dev/pg_bm25) - PostgreSQL extension that enables full text search over SQL tables using the BM25 algorithm, the state-of-the-art ranking function for full-text search.
* [pg_search](https://github.com/paradedb/paradedb/tree/dev/pg_search) - PostgreSQL extension that enables full-text search over SQL tables using the BM25 algorithm, the state-of-the-art ranking function for full-text search.
* [tantivy](https://github.com/quickwit-oss/tantivy) [[tantivy](https://crates.io/crates/tantivy)] — A horse-speed full-text search engine library written in Rust. [![Build Status](https://github.com/quickwit-oss/tantivy/actions/workflows/test.yml/badge.svg)](https://github.com/quickwit-oss/tantivy/actions/workflows/test.yml)