Shards Dashboard Lite is a free and ready-to-use admin dashboard template built on the top of Bootstrap 4 that comes in SCSS and Sketch files.
Free HTML UI Kits
Free HTML UI kits including tons of elements and ready to be used
Shards is a free design system based on Bootstrap 4 framework which includes responsive components and icons from both Material and Font Awesome.
Design Blocks is a free set of more than 170 responsive components in HTML for assembling a website or an hybrid app in minutes.
Carbon Design System is a free set of UI kit released by IBM and available for designers and developers, as Sketch file and HTML + SCSS component library.
Element is a complete and minimal framework based on Vue.js that includes many useful UI components to quickly build websites and apps.
Photon is an UI toolkit for building full featured desktop apps with Electron using simple HTML and CSS.
Material Design for Bootstrap is a theme for Bootstrap 3 which let you use Google Material Design in your favourite front-end framework.
uilang is a minimal programming language for web designers. You can easily create custom user interface components and build prototypes.
Bootflat is an open source flat UI kit based on Twitter’s Bootstrap 3.1 CSS framework. It provides a faster way to create elegant web apps.
Here is a flat design user interface inspired to a PSD freebie by GraphicBurger. This HTML5 + CSS3 ready-coded template is not complete yet.