Ask HN: What are your staple tools for creating a good UI/UX?

Ask HN: What are your staple tools for creating a good UI/UX? When you start a new project, which tools/plugins/elements are you using to make it beautiful and intuitive? Javascript libraries, CSS frameworks, fonts, other tools, etc... A couple to start with: - Bootstrap (https://github.com/twbs/bootstrap) - FontAwesome (https://github.com/FortAwesome/Font-Awesome) - Normalize (https://github.com/necolas/normalize.css) - Chosen (https://github.com/harvesthq/chosen) - Angular (https://github.com/angular) - Parsley (http://parsleyjs.org/) - Subtle Patterns (http://subtlepatterns.com/) - Color Scheme Designer (http://paletton.com/) - Sketch (http://bohemiancoding.com/sketch/)