#1
SM Attributes Search - Responsive Magento 2 Module
SM Attribute Search is a flexible, easy and robust product attribute filter Magento 2 module for your shop. Just simply choose the desired terms, it finds matching products and shows them on the homepage.
#2
Advance Ajax Search for Magento 2
This is a great add-on module for your Magento store. The module will help your customers to easily find the products based on Keyword Search. With Ajax empowered technology, visitors do not have to wait for the whole Magento page to reload to see their search results. It works fine on many Magento 2x versions.