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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Spin JS
456,729 websites

Spin JS is free to use

http://spin.js.org/

Spin.js dynamically creates spinning activity indicators that can be used as resolution-independent replacement for AJAX loading GIFs.

Market Share by Top Websites

1 Backbone.js is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Spin JS is clearly lagging behind, losing to Backbone.js in all segments.

Websites Categories

1 Backbone.js has better usage coverage in more websites categories. Including Arts & Entertainment, Games, Adult, Lifestyle and 13 other categories.

2 Spin JS is leading in Science & Education, Travel & Tourism, Law & Government, E-commerce & Shopping and 3 other categories.

Geography

1 Backbone.js is leading in most countries, including United States, United Kingdom, Canada, Germany and 139 other countries.

2 Spin JS is leading in Russia, Taiwan, Poland, Greece and 15 other countries.