Papa Parse
Fast and powerful CSV (delimited text) parser that gracefully handles large files and malformed input
Mesh.js
common, streamable interface for synchronizing data
Isjs
Check your data against regular expressions or known keywords.
String Score
JavaScript string ranking 0 for no match upto 1 for perfect... "String".score("str"); //=> 0.825
Holmes
Fast and easy searching inside a page
Clusterize.js
Tiny vanilla JS plugin to display large data sets easily
Underscore.db
Pure JavaScript database based on Underscore for Node, node-webkit and the browser
Faye
Simple pub/sub messaging for the web
Alchemy
Alchemy.js is a graph drawing application built in d3.
D3 Cloud
Create word clouds in JavaScript.
Rusha
High-performance pure-javascript SHA1 implementation suitable for large binary data, reaching up to half the native speed.
Vue Ls
:boom: Vue plugin for work with local storage, session storage and memory storage from Vue context
JSON.js
JSON in JavaScript
Datamaps
Maps for interactive data visualizations in Javascript
Chartkick
Create beautiful Javascript charts with one line of Ruby
Knex
A query builder for PostgreSQL, MySQL and SQLite3, designed to be flexible, portable, and fun to use.
Data Tables
DataTables is a plug-in for the jQuery Javascript library. It is a highly flexible tool, based upon the foundations of progressive enhancement, which will add advanced interaction controls to any HTML table.