WordPress was born out of a desire for an elegant, well-architectured personal publishing system built on PHP and MySQL and licensed under the GPLv2.
Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web.
Less is a CSS pre-processor, meaning that it extends the CSS language, adding features that allow variables, mixins, functions and many other techniques that allow you to make CSS that is more maintainable, themable and extendable.
SASS is the most mature, stable, and powerful professional grade CSS extension language in the world.
A package manager for the web.
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