Bootswatch

Bootswatch provides a collection of free, open-source themes for Bootstrap, the popular front-end framework. Each theme is a drop-in replacement for Bootstrap's default styling, allowing developers to quickly customize the appearance of their web applications without writing custom CSS. The themes are built using Bootstrap's Sass variables and maintain full compatibility with Bootstrap components, ensuring seamless integration. Bootswatch is ideal for developers who want professional-looking designs without the overhead of hiring a designer or spending time on custom styling.