Bootstrap 4 themes and tools for web developers
HackerThemes provides themes, templates and tools built with and for Bootstrap 4. The themes are open source and licensed under MIT.
Stream UI Kit
A beautiful open source Bootstrap 4 UI kit
Stream UI Kit is beautiful Open Source Bootstrap 4 UI Kit under MIT license. The UI Kit comes with 5 beautiful complete pages and includes over 20 reusable and customizable UI Blocks. It’s lightweight and only ~17kb when minified.