searchcode - A source code search engine
Typesense - Typo tolerant, delightfully simple, open source search 🔍
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.
SearchWP - Instantly improve the search experience of your WordPress site today with SearchWP, the best WordPress search plugin you can find!
The Search - The all in one search engine for PH, DN, HN and GitHub ✊
Meilisearch - Ultra relevant, instant, and typo-tolerant full-text search API