Penguin is a lightweight and extensible framework made out of Sass for beautiful front end development. It is focused on developers, including a small Gruntfile for compiling SCSS easily and several Sass mixins.
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Oneday is a cool framework that works within Sketch made for prototyping and creating websites in an easy and quick way. It has predefined items to help you create faster, it helps you change colors easily, take advantage of its responsive capabilities to create a lightweight yet powerful website.
A generative programming and knowledge-based engineering open-source framework. It allows you to build complete mobile and web apps by using high-level declarative, object-oriented problem solving and including the ability to generate and manipulate 3D geometry.