Question on bento box search tools

Hello All, I am looking to implement a bento box search tool similar to what is on or when you search something.

Does anyone know where I can find a good site to learn this or how to implement it.
The UI/UX elements of a bento box are relatively simple and straight forward. Pulling the search results (intelligently sorted by relevancy) is very difficult and non-trivial.

I am trying to find what current bento box search tools exist. So I can implement and answer these questions:

– Title of the tool/application
– Where was it found
– Where is it used (example)
– What language(s) is it built in
– What dependencies it has
– Estimate how easy/difficult it is to implement
– Provide your personal assessment of the quality/effectiveness of the tool

Thank you.