Xapian is a free and open-source probabilistic information retrieval library, released under the GNU General Public License (GPL).[2] It is a full-text search engine library for programmers.
Meilisearch: Unified Search & AI Retrieval Platform
Build lightning-fast search and AI retrieval with Meilisearch. Open-source, developer-friendly search engine trusted by 20,000+ teams worldwide.
Spacedrive — A local-first data engine for everything you own
Index any data source. Search everything from one place. Keep it on your machine.
Google for Developers Blog - News about Web, Mobile, AI and Cloud
Explore LangExtract: a Gemini-powered, open-source Python library for reliable, structured information extraction from unstructured text with precise source grounding.
Tools for working with OpenAPI | OpenAPI.tools
A comprehensive and open source list of resources for developers working with OpenAPI.
DITA Open Toolkit
The open-source publishing engine for content authored in the Darwin Information Typing Architecture
lexidex
This is a web index of atproto data and API schemas: Lexicons. It is an ✨Experimental✨ project from the protocol team at Bluesky.
Staan — The European Search API for developers & AI
An independent European web search index. Real-time, source-cited results from €2 per 1,000 requests — 1,000 free each month.
X Open-Sourced Its Algorithm on GitHub: Here's What the Code Actually Says
xAI published the full X recommendation algorithm on GitHub in January 2026 and updated it again in May. We read the code so you don't have to. Here is what the source actually reveals about how your posts get ranked — and the exact tactics to use it.
PeARS - the People's Search Engine
PeARS is an open-source, curated search engine that lets you take control of your search. It has privacy and energy efficiency at its core.
kerim/zotero-mcp-skill
Claude Desktop skill for comprehensive, multi-strategy searching of Zotero libraries via MCP server with semantic search
ParadeDB — Search without a second system
One Postgres for your application data, full-text search, vector retrieval, and aggregations. Home of the pg_search extension.
The Cypherpunk Library
A personal collection of good public-domain reads. Free to read, free to keep.
readme.club - Community-driven resource sharing for Xteink users
Share and discover language files, documentation, tools, wallpapers, feature requests, and more
Introducing the Elicit API - Elicit
Search our 138M+ papers and generate Reports using our API.
Community Search Engines
Habitat's road to release: 08 search - building [at] habitat
What and Whose Knowledge? Measuring Epistemic Diversity in Large Language Models
Mellon Foundation
Axios Media Trends: 🔗 Link economy breaks
FR#154 – Search and Community
Wikipedia blacklists Archive.today, starts removing 695,000 archive links