Bootstrap is a free and open-source front-end library for designing websites and web applications.
Foundation is a responsive front-end framework. Foundation provides a responsive grid and HTML and CSS UI components.
HTML5 is a markup language used for structuring and presenting content on the World Wide Web. It is the fifth and current major version of the HTML standard.
Angular is a TypeScript-based open-source front-end web application platform led by the Angular Team at Google and by a community of individuals and corporations. Angular is a complete rewrite from the same team that built AngularJS.
This framework is lightweight and modular and is used for creating fast but powerful web interfaces. Ulkit is basically a collection of easily customized components and it has HTML Editor, Flex and other add-ons and unique components. Its core principles are RWD and mobile first and Ulkit is widely used in a lot of Wordpress themes.
Sass is a style sheet language initially designed by Hampton Catlin and developed by Natalie Weizenbaum. After its initial versions, Weizenbaum and Chris Eppstein have continued to extend Sass with SassScript, a simple
Less is a dynamic preprocessor style sheet language that can be compiled into Cascading Style Sheets and run on the client side or server side. Designed by Alexis Sellier, Less is influenced by Sass and has influenced the newer "SCSS" syntax of Sass, which adapted its CSS like block formatting syntax.
Semantic is a development framework that helps create beautiful, responsive layouts using human-friendly HTML.