LibreX - Framework and javascript free privacy respecting meta search engine
Sherlock - Sherlock provides insights on user engagement for product makers.
Searx - Open source metasearch engine
Userlane - Digital adoption platform with interactive guidance for software applications allowing anyone to understand and master any software from the get-go.
SearXNG - SearXNG is a free internet metasearch engine which aggregates results from various search services and databases. Users are neither tracked nor profiled.
UserGuiding - User onboarding made easy, for less. Create product walkthroughs in a couple of clicks, without breaking the bank.