searchcode - A source code search engine
Autocomplete as a Service - The domain name aaas.io is being parked on Park.io. Contact the domain owner to make an offer right now...
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.
Youtube Word Search - Search and seek to specific words in youtube videos
The Search - The all in one search engine for PH, DN, HN and GitHub ✊
Typesense Cloud - Open source alternative to Algolia, now with a SaaS version