UI frameworks
Powerful extensible and feature packed frontend toolkit Build and customize with Sass utilize prebuilt grid system and components and bring projects to life with powerful JavaScript plugins

JavaScript libraries
Swiper is the most modern free mobile touch slider with hardware accelerated transitions and amazing native behavior

CDN
The recommended free CDN for Bootstrap Font Awesome Bootswatch and Bootstrap Icons

Ecommerce
The World Wide Web Consortium W3C develops standards and guidelines to help everyone build a web based on the principles of accessibility internationalization privacy and security