Open source. Open possibilities.

SearXNG is a free, privacy-respecting metasearch engine that aggregates results from multiple search services and databases without tracking or profiling users.

Educational collection of algorithms implemented in Java, intended for learning purposes. Includes a full directory of applications, contribution guidelines, and support for running/editing in Gitpod.

A fast, community-driven file search and application launcher for Windows that enhances workflow through a wide array of plugins and system integrations.

GPT Researcher is an open-source autonomous agent that performs deep research using web and local documents, generating detailed reports with citations. It supports multi-agent workflows, image generation, and integrates with Claude via MCP.

PixelRAG renders documents as screenshots and retrieves over images directly, preserving visual structure like tables and charts that text parsing loses. Includes a hosted 8.28M-page Wikipedia index, CLI tools, and Claude Code integration.

fd is a fast, user-friendly alternative to the 'find' command for locating entries in your filesystem.

OpenSearch is an open-source, enterprise-grade distributed search and observability suite designed to manage unstructured data at scale.

DocsGPT is an open-source AI platform for building intelligent agents and assistants, featuring document analysis, multi-model support, and enterprise search capabilities.

Typesense is a fast, typo-tolerant, in-memory fuzzy search engine designed as an open-source alternative to Algolia and a simpler alternative to Elasticsearch.

A Python library and CLI tool for searching the SLB Energy Glossary in English and Spanish, featuring live site scraping, local SQLite caching, and semantic search capabilities.

An all-in-one AI framework for semantic search, LLM orchestration, and language model workflows.

FrogDB is a pre-release, Redis 8.0-compatible, memory-first database written in Rust. It speaks RESP2/RESP3 for drop-in use with existing Redis clients and provides core and module-style data types, JSON, time series, vector and full-text search, Raft-based clustering with read replicas, and RocksDB-backed persistence.

ripgrep (rg) is a fast, line-oriented recursive search tool that searches directories for regex patterns while respecting gitignore rules.

Apache Doris is an open-source, real-time analytics and search database based on MPP architecture, providing fast SQL analytics and hybrid search capabilities.

PaperQA2 is a high-accuracy RAG framework for answering questions from scientific documents with citations, supporting PDFs, Office files, and code with agentic workflows and multi-provider LLM support.

A lightning-fast search engine API providing AI-powered hybrid search, typo tolerance, and search-as-you-type capabilities for websites and applications.

Qdrant is a high-performance vector similarity search engine and database written in Rust, designed for AI applications requiring semantic search and large-scale vector management.

Clean, well-documented Python implementations of common algorithms and data structures for learning and reference.