Material Kit is a Bootstrap 4 UI Kit with a fresh, new design inspired by Google's material design. Along with the restyling of the Bootstrap elements, you will find three fully-coded example pages, to help you design your next project. Shared at Creative Tim, licensed under the MIT license for the free version.

A simple, responsive, and modular front-end framework for developing fast web interfaces. Its design is clean as well as its documentation for start using it now (no extra knowledge needed). Developed by GitHub user Habib Hadi (im4aLL), licensed under the MIT license.

This is a complete implementation of the Bulma UI framework for React. RBX is designed with a style that is minimal yet robust and it's written with TypeScript 3 for React 16 that is compatible with the latest Bulma implementations. It has extensive customization support and can be installed as easily as installing a React component. Developed by Devin Fee (dfee), available under the MIT License.

This is a bootstrap 4 UI kit and website template inspired by Google's material design. It is best suited for business, agency, corporate, startup and portfolio websites. It is also easy to customize and comes with Sass files and organized code which makes it developer friendly. Created and shared at UI Deck.

This is a website UI kit, built with Bootstrap 4. It has over 100 completely customizable and ready to use UI components, featuring 14 navbar/menus, 15 headers/hero sections, 9 feature sections, 12 forms, 4 call-to-actions, 6 counters, 5 showcase sections, 6 people profiles, 14 footers designs, and more! Created by GitHub user Ankit Shukla (ankythshukla).

A Vue 2.0 based component library for developers, designers, and product managers. All the elements are consistent in design style including icons, texts, badges, boxes, etc. This UI toolkit uses BEM-styled CSS so that you can override styles easily. Created by ElemeFE (饿了么前端), licensed under the MIT license.

A set of 12 Bootstrap 4 themes with a unique, modern style. The themes are easy to customize and includes example layout templates per theme to demonstrate Bootstrap 4 elements, components, and content integration. Created by Tophat, licensed under the MIT License.

A beautiful Bootstrap 4 UI Kit that includes over 20 reusable and customizable UI Blocks among colors, buttons, forms alerts, modals and more! It also comes with 5 complete website pages that works as example and structure for new projects. It’s lightweight and only ~17kb when minified. Developed by Htmlstream team licensed under MIT license.

An admin dashboard template, with a responsive layout and a high-quality UI built with Bootstrap 4. On its lite version, it features styled components like buttons, modals, typography, tables, notifications, hover sidebar, icons, and a dashboard sample. In general, this dashboard will help you keep track of analytics, dynamic forms data, UI and UX elements, and much more. Created by Flatlogic under MIT license.

A fully responsive CSS UI framework with custom design controls and a simple structure. The components are fully customizable and work perfectly in tune with your CSS. Among its components, you will find the default core of this framework, animations, common elements like cards, headers and frames, and more! Created by Github user Stanley Lim under MIT license.

A powerful tool for prototyping web applications and websites that enables teams to efficiently work together, document HTML/CSS components and provide a single source of truth for what an application should look like. It is primarily meant to create prototypes for web applications but can be used to generate any website.

Built over Vue Material and Vuejs, this beautiful template will help you get started developing dashboards in no time. Using the Dashboard is pretty simple but requires basic knowledge of Javascript, Vuejs and Vue Router. 

Cross-platform and fully responsive front-end interface based on Google's Material Design, developed using Bootstrap 4. This UI gives all Bootstrap components and elements a Google Material Design look and adds support for some unique Google Material Design components such as floating buttons, pickers, and steppers, to name a few, which cannot be achieved by transforming existing Bootstrap components. Project by Daemon Internet Consultants.

CSS Mint is an Open Source and lightweight UI kit built over Normalize.css to handle cross-browser inconsistencies, aiming to reduce markup and to make easy the structure and layout of your web application.

This is a completely customizable HTML UI Kit that includes 8 website landing page templates built with Bootstrap 4. UnderExpress has over 100 custom UI components to make stunning web projects. Use it to save time and create the best home for your idea on the web.

A set of over 150 design blocks totally responsive built with Bootstrap 4. To start simply use the builder and download the subsequent code. In the downloaded archive, you will find directories and files providing both compiled and minified CSS variations. At the moment of this publication, Froala Web Design Blocks supports all major web browsers.

Tabler is a stunningly beautiful admin dashboard template with a fully responsive design, support for mobile, tablet and desktop. Tabler is responsive in all major browsers works perfectly with: latest Chrome, Firefox+, latest Safari, Opera, Internet Explorer 10+ and mobile browsers with continous support and updates. The dashboard only use modern web technologies like HTML5 and CSS3, includes some subtle animations, and a clean code structure following Bootstrap’s guidelines to make integration as easy as possible. All code is handwritten and W3c valid. Tabler also includes over 20 individual pages featuring various components, giving you the freedom of choosing and combining. All components can take variation in color and styling, that can easily be modified using Sass.

Material Design UI Kit for Bootstrap 4 featuring 400+ material UI elements, 600+ material icons, 74 CSS animations, SASS files, templates, tutorials and many more. Includes a detailed user-friendly documentation at your disposal and a wide array of tutorials to help you implement your ideas easily. Free for personal and commercial use.

Boomerang UI is a comprehensive HTML UI kit based on Bootstrap 4 featuring multiple functionalities and controls, extended color palette, and beautiful typography designed as its own extended version of Bootstrap at the highest level of quality. Includes Sass, FontAwesome 5, 50 reusable Bootstrap components with modular elements, five integrated plugins, and more!

Free and open source, Business Tycoon by HackerThemes is a collection of sharp Bootstrap 4 components for building a professional looking business website. It features carousels, buttons, boxes, cards, groups and dropdown menus, forms, navigation buttons, and everything else in between, to craft a great bootstrap website quickly. 

Great looking interactive UI designed in flat style by Codepen user Javier Latorre López-Villalta, it was made completely in HTML5 and CSS3. It features several components like calendars, social media logins, messages, invites, events, account, statistics and more.

Shards, a design system based on Bootstrap 4, and created by DesignResvision, is a lightweight, comprehensive UI Design Toolkit for creating stunning website interfaces. Responsive by default, It features an in-depth control over the visual aspects of your designs, over 1.5k Icons from Material Design and FontAwesome, and a complete documentation to get you started in no time. Includes the original Sketch and SCSS to create new layouts or customize the kit as is to better fit your project's needs!

This is a great starter UI Kit known as Fiber, created with and by Framer, contains tons of UI elements, screens, buttons, common interactions, multi-screen artboards, all in one handy prototype kit to create High Fidelity UIs. Every artboard included is already hooked up to interactions in Code, and you can customize every aspect of this kit from text, images, animation values etc, to create a prototype that fits your project's needs perfectly. 15 Organized Screens, 36 Seamless Interactions, 49 Unique UI Elements, many possibilities!

Based on the jQuery accordion by Paul Kelley, Codepen user Ren Aysha took the concept and decided to bring into a pure CSS form, using elements instead of images and Genericons fonts as social media icons.

Nifty CSS3 Checkbox Styles created by codepen user Brad Bodine, functional and stylish, with a short and lightweight code for easy implementation.