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It is built for the purpose of providing a free and open-source GUI prototyping tool that people can easily install and use to create mockups in popular desktop platforms. | Discover 500+ curated design resources, CSS generators, color tools, and developer utilities. Free tools for designers and developers to speed up your workflow. |
Wireframing;
Prototyping;
Mockups;
Cross-platform | generators, tools, resources, selfhosted |
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GitHub Stars 9.3K | GitHub Stars - |
GitHub Forks 735 | GitHub Forks - |
Stacks 14 | Stacks 0 |
Followers 16 | Followers 1 |
Votes 0 | Votes 1 |
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Sass is an extension of CSS3, adding nested rules, variables, mixins, selector inheritance, and more. It's translated to well-formatted, standard CSS using the command line tool or a web-framework plugin.

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.

Stylus is a revolutionary new language, providing an efficient, dynamic, and expressive way to generate CSS. Supporting both an indented syntax and regular CSS style.

Balsamiq Mockups is a web tool that allows users to mock up different designs and ideas quickly and easily. Balsamic Mockups is similar to drawing mockups, but it is digital

PostCSS is a tool for transforming CSS with JS plugins. These plugins can support variables and mixins, transpile future CSS syntax, inline images, and more.

It is a free & open-source developer toolkit for expressing visual styles that can be shared across codebases, native platforms, and teams. It radically lowers the cost of delivering a consistent visual identity across native apps & websites.

It is a code-based design tool that merges design and engineering into one unified process. Thanks to conditional interactions, variables, state-based animations, and powerful expressions, you can build prototypes that feel like the real thing. In other words, anything that's on the web can be accurately prototyped in UXPin.

UX guidelines, HTML/CSS framework, and Angular components working together to craft exceptional experiences. Start building with our HTML/CSS framework and rapidly go from prototype to production.

Bourbon is a library of pure sass mixins that are designed to be simple and easy to use. No configuration required. The mixins aim to be as vanilla as possible, meaning they should be as close to the original CSS syntax as possible.
The compass core framework is a design-agnostic framework that provides common code that would otherwise be duplicated across other frameworks and extensions.