Kendo UI
17,542 websites

Kendo UI offers both free and paid options

http://www.telerik.com/kendo-ui

Fast, light, complete: 70+ jQuery-based UI widgets in one powerful toolset.

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KonamiJS
3,283 websites

KonamiJS is free to use

http://code.snaptortoise.com/konami-js/

The Konami Code is a "cheat code" that appeared in many of Konami's video games going all the way back to 1986. Konami JS allows websites to add their own easter to be triggered by their users by entering the Konami code key press sequence:...

Market Share by Top Websites

1 Kendo UI is leading in Top 1M Sites and The Entire Web.

2 KonamiJS is leading in Top 10K Sites and Top 100K Sites.

Websites Categories

1 Kendo UI has better usage coverage in more websites categories. Including Science & Education, Finance, Law & Government, Computers Electronics & Technology and 19 other categories.

2 KonamiJS is leading in Adult.

Geography

1 Kendo UI is leading in most countries, including United States, Canada, Australia, United Kingdom and 132 other countries.

2 KonamiJS is leading in Japan, Bolivia, Algeria, Paraguay and one other country.