SearXNG - SearXNG is a free internet metasearch engine which aggregates results from various search services and databases. Users are neither tracked nor profiled.
Sherlock - Sherlock provides insights on user engagement for product makers.
Brave Search - Private search that puts you first, not big tech
SpiderFoot - Open source intelligence (OSINT) automation tool.
Searx - Open source metasearch engine
OSINTBuddy - A plugin based open source alternative to Maltego