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.
Open-source (font OFL, code MIT, docs CC BY) icon font and CSS toolkit. No JavaScript required. Documentation includes accessibility instructions/recommendations.
Public-domain (CC0 1.0) collection of SVG icons and hexadecimal color codes for over 200 popular brands. Also includes CSS, LESS, SCSS with color variables, making it a sort of proto-framework.
MIT-licensed HTML5 template and CSS framework built for responsive design based on a 12-column grid. The boilerplate contains no JavaScript, just HTML, CSS and example site icons (favicon & iOS).
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.