Apache Lucene - High-performance, full-featured text search engine library written entirely in Java.
DataTables - DataTables is a plug-in for the jQuery Javascript library.
Six Degrees of Wikipedia - Find the shortest path between two subjects
List.js - Tiny, invisible and simple, yet powerful and incredibly fast vanilla JavaScript that adds search...
Sphinx Search - Sphinx is an open source full text search server, designed with performance, relevance (search quality), and integration simplicity in mind. Sphinx lets you either batch index and search data stored in files, an SQL database, NoSQL storage.
AG Grid - The best HTML5 datagrid in the world