Google Custom Search Engine - Google Custom Search is a platform provided by Google that allows web developers to feature specialized information in web searches, refine and categorize queries and create customized search engines, based on Google Search.
Search engine composer - Website search engine software: Create Search Engine for your online website, Intranet, CD and DVD in Minutes!
Apisearch - Apisearch official website.
Apache Solr - Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and...
Site Search 360 - Site Search 360 enhances and improves your built-in CMS or product search with autocompletion, semantic search, filters, facets, detailed analytics, and a whole lot of customization options.
Mashape Analytics - Real-time analytics for APIs and microservices