Alternatives and similar repositories for polyfill

Users that are interested in polyfill are comparing it to the libraries listed below

• taylorhakes / promise-polyfill
  Lightweight ES6 Promise polyfill for the browser and node. A+ Compliant
  ☆2,157Updated last year
• addyosmani / basket.js
  A script and resource loader for caching & loading files with localStorage
  ☆3,358Updated 3 months ago
• ModuleLoader / es-module-loader
  Polyfill for the ES Module Loader
  ☆2,223Updated 6 years ago
• jquery-archive / PEP
  Pointer Events Polyfill: a unified event system for the web platform
  ☆1,662Updated 4 years ago
• WebReflection / url-search-params
  Simple polyfill for URLSearchParams standard
  ☆761Updated 6 years ago
• megawac / MutationObserver.js
  ES3 Shim for the MutationObserver interface via DOM diffing.
  ☆338Updated 2 years ago
• es-shims / es5-shim
  ECMAScript 5 compatibility shims for legacy (and modern) JavaScript engines
  ☆7,104Updated 2 years ago
• sprity / sprity
  A image sprite generator
  ☆478Updated 3 years ago
• devote / HTML5-History-API
  HTML5 History API expansion for browsers not supporting pushState, replaceState
  ☆1,007Updated 4 years ago
• googlearchive / observe-js
  A library for observing Arrays, Objects and PathValues
  ☆1,350Updated 9 years ago
• paulmillr / es6-shim
  ECMAScript 6 compatibility shims for legacy JS engines
  ☆3,115Updated 5 months ago
• bestiejs / json3
  A JSON polyfill. No longer maintained.
  ☆1,018Updated 6 years ago
• sindresorhus / gulp-rev
  Static asset revisioning by appending content hash to filenames: `unicorn.css` → `unicorn-d41d8cd98f.css`
  ☆1,543Updated last year
• tildeio / rsvp.js
  A lightweight library that provides tools for organizing asynchronous code
  ☆3,605Updated last year
• requirejs / text
  An AMD loader plugin for loading text resources
  ☆926Updated 6 years ago
• YuzuJS / setImmediate
  A cross-browser implementation of the new setImmediate API.
  ☆1,298Updated last year
• eligrey / classList.js
  Cross-browser element.classList
  ☆1,103Updated 6 years ago
• WebReflection / dom4
  Modern DOM functionalities for every browser
  ☆931Updated 4 years ago
• jamesallardice / Placeholders.js
  A JavaScript polyfill for the HTML5 placeholder attribute
  ☆946Updated 2 years ago
• babel / babel-standalone
  Now located in the Babel repo! Standalone build of Babel for use in non-Node.js environments, including browsers.
  ☆820Updated 7 years ago
• gulpjs / vinyl
  Virtual file format.
  ☆1,282Updated 11 months ago
• requirejs / almond
  A minimal AMD API implementation for use after optimized builds
  ☆2,413Updated 4 years ago
• guybedford / require-css
  A RequireJS CSS loader plugin to allow CSS requires and optimization
  ☆978Updated 4 years ago
• calvinmetcalf / lie
  A basic but performant promise implementation.
  ☆746Updated 4 years ago
• stefanpenner / es6-promise
  A polyfill for ES6-style Promises
  ☆7,292Updated 2 years ago
• GoogleChrome / proxy-polyfill
  Proxy object polyfill
  ☆1,145Updated 11 months ago
• requirejs / r.js
  Runs RequireJS in Node and Rhino, and used to run the RequireJS optimizer
  ☆2,568Updated 10 months ago
• shama / webpack-stream
  Run webpack through a stream interface
  ☆1,394Updated 3 years ago
• louisremi / background-size-polyfill
  Adds support for background-size "cover" and "contain" to IE8
  ☆1,256Updated 11 years ago
• arv / ExplorerCanvas
  Canvas for IE8 and older
  ☆615Updated 4 years ago