Backbone.js
781,951 websites

Backbone.js is free to use

http://backbonejs.org/

Backbone.js gives structure to web applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing A...

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Infinite Scroll
893,352 websites

Infinite Scroll offers both free and paid options

https://github.com/metafizzy/infinite-scroll

jQuery plugin for infinite scrolling.

Market Share by Top Websites

1 Infinite Scroll is leading in Top 100K Sites, Top 1M Sites and The Entire Web.

2 Backbone.js is leading in Top 10K Sites.

Websites Categories

1 Infinite Scroll has better usage coverage in more websites categories. Including Science & Education, Computers Electronics & Technology, Community & Society, Health and 15 other categories.

2 Backbone.js is leading in Arts & Entertainment, Games, Adult, Lifestyle and one other category.

Geography

1 Infinite Scroll is leading in most countries, including Germany, Italy, France, United Kingdom and 138 other countries.

2 Backbone.js is leading in United States, Canada, Australia, South Korea and 20 other countries.