Top SEARCH-ENGINE GitHub Repositories & Tools (2026)

A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools and more.

XERJ is the new way for AI to search data. Its autoindex capability activates agents to know your data without the token waste of grep and sed. One command indexes code, docs, logs and PDFs for search, RAG, security audits and agent memory, using 40x fewer tokens than grep. Elasticsearch compatible, so existing clients just work.

A lightweight, lightning-fast, in-process vector database

One Postgres for your application data, full-text search, vector retrieval, and aggregations. Home of the pg_search extension.

Tantivy is a full-text search engine library inspired by Apache Lucene and written in Rust

Apache Lucene open-source search software

Solr-powered search for Ruby objects

Search Engine Optimization (SEO) for Ruby on Rails applications.

An Android app for searching torrents across multiple providers with fast search speed, detailed results, and packed with complete torrent actions.

Apache Solr open-source search software

Self-hosted SERP API for AI, SEO & automation. Browser-rendered Google, Bing, Yandex, Baidu, DuckDuckGo and Ecosia search with page extraction 🎉

ArcadeDB Multi-Model Database, one DBMS that supports SQL, Cypher, Gremlin, HTTP/JSON, MongoDB and Redis. ArcadeDB is a conceptual fork of OrientDB, the first Multi-Model DBMS. ArcadeDB supports Vector Embeddings.

Open-source, self-hosted enterprise & site search server built on OpenSearch. Crawls web / file / DB / cloud sources, 20+ languages, REST API, and AI/RAG & semantic search. Apache-2.0.

Yet another awesome browser extension for switching search engines, search everything (selection text / image / link / find in page) on any engine with a simple right click or a variety of menus and shortcuts. Build with React & Material-UI. (WIP).

Smile ElasticSuite - Magento 2 merchandising and search engine built on ElasticSearch

Language model search engine built on a vector database and an anything key/value store.

Acts As Indexed is a plugin which provides a pain-free way to add fulltext search to your Ruby on Rails app

valkey-search is a C++ module which extends valkey with vector search and secondary indexing capabilities. It enables users to index and query data stored in Valkey using complex queries with filters while maintaining high performance and scalability.

The AI search platform

Infinispan is an open source data grid platform and highly scalable NoSQL cloud data store.