Analytics
Plausible is a lightweight and open source Google Analytics alternative Your website data is 100 yours and the privacy of your visitors is respected

JavaScript libraries
Touch enabled jQuery plugin that lets you create beautiful responsive carousel slider

Authentication
Secure customer information using the same user authentication system used by Amazon com reducing registration friction

JavaScript frameworks
Vue js The Progressive JavaScript Framework

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

Widgets
Quill is a free open source WYSIWYG editor built for the modern web Completely customize it for any need with its modular architecture and expressive API