Bootstrap · The world's most popular mobile-first and responsive front-end framework.
Bootstrap, a sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development.
Maxmertkit
Maxmertkit, powerful, most customizable and easiest for usage mobile first front-end framework for web-development.
Augur · Now It's Personal
Augur is an API that powers the personalization behind your favorite web applications.

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JS Robots
JS Touch Layer
jsAnim
jsAnim is a powerful, yet easy to use library for adding impressive animations to websites, without sacrificing standards or accessibility. Weighing in at just under 25 kilobytes, jsAnim packs a lot of punch for such a little application.
JSBooks - directory of free javascript ebooks
JScript Memory Leaks
jsDelivr
Similar to Google Hosted Libraries, jsDelivr is an open source CDN that allows developers to host their own projects and anyone to link to our hosted files in their websites.
jsFiddle
JSHint
JSHint for more flexible static analysis of JavaScript programs.
JShrink
JShrink is a PHP class that minifies javascript so that it can be delivered to the client quicker.
JSLint
JSLint for detecting errors or problems by static analysis of JavaScript programs.
JSLint Error Explanations
JSLint Error Explanations for explanations of the warnings given by JSLint and JSHint.
JSlitmus
JSLitmus is a lightweight tool for creating ad-hoc JavaScript benchmark tests.
JSO - a Javascript OAuth Library
JSON Query Language
JSON Query Language is a query and processing language specifically designed for the popular JSON data model.
jsPerf
jsPerf aims to provide an easy way to create and share test cases, comparing the performance of different JavaScript snippets by running benchmarks.
jsPerf the JavaScript performance playground
JSPkg
reference library and package manager
jStat
jster
jSwipeKinetic
jSwipeKinetic is a jQuery plugin that enables you to add kinetic scrolling on your touch optimized projects. jSwipeKinetic is build on top of jGestures (jgestues.codeplex.com).
Jubail Industrial College
Jubail University College
Judson College
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Jumpstart UI
Another catalog for paid themes
Juniata College
Junior
Juntendo University
Just Enough Ruby to Get By
Just.me
JustFab
Justin Guitar | Free Guitar Lessons
Completely free guitar lessons from Justin Sandercoe including beginners, electric, acoustic, blues, rock, jazz, folk, technique, aural training and a whole lot more. All free. No bull!
Justus Liebig Universität Gießen
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Kabardino-Balkarian State University
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Kabul University
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Kagawa Institute of Nutrition
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Kaggle Competition Data
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Kaixin001
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Kaliningrad State Technical University
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Kaluga State Pedagogical University
Kamakura Women's College
Kamalolmolk Art & Architecture Higher Education Institute of Noshahr
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Kameshwar Singh Darbhanga Sanskrit University
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Kampala University
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Kanagawa Institute of Technology
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Kanazawa Institute of Technology
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Kanban and Scrum - making the most of both
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Kanto Gakuin University