Ninfex - Experimental people-powered search engine
Algolia - Algolia's Search API makes it easy to deliver a great search experience in your apps & websites. Algolia Search provides hosted full-text, numerical, faceted and geolocalized search.
Sourcer Browser Extension - Sourcer is your essential tool to bring back trust in online information efficiently.
Search Grader by Algolia - A free tool to evaluate your product's search experience
Wakie - Get Instant phone advice from peers
Webflow Site Search - Design and build custom search for Webflow sites — visually