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Formerly node-webkit. Use NodeJS within the DOM; create cross-platform packaged apps.
MIT-licensed cross-platform HTML5+AngularJS mobile app development framework (docs use Apache 2.0 license). The developer offers commercial packages that provide cloud services.
MIT-licensed front-end web framework based on Google's Material Design.
MIT-licensed front-end web framework.
Browser-based concept-mapping software based on TiddlyWiki
Handy tool for examining DOM KeyboardEvent(s); displays/logs sample input, legacy properties, UIEvent properties, and proposed properties; color-codes event types (e.g., keydown, keyup)
Extensible UI component library for web apps and Chrome packaged apps, created for use with Google's "Material Design" guidelines.
API for Chrome apps and extensions
which can also be used in browser extensions."
Created by Glenn Jones and released under the MIT License.
Free (libre), open-source (Apache 2.0 license) HTML5 and CSS3 responsive front-end web framework.
The GNU Emacs Major Mode web-mode.el can be used for editing HTML templates (PHP / JSP / TWIG / ERB / JS / CSS)
A MIT-licensed template for HTML5 websites that includes a lot of CSS and JS tweaks and optimizations. It provides support for JQuery, Google Analytics, old browsers, etc.
GeekFG's web services & applications - Online Bookmarklet Creator