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

Analytics
Clarity is a free user behavior analytics tool that helps you understand how users are interacting with your website through session replays and heatmaps

CMS
Builder io gives developers and marketers the toolkit to transform designs into optimized web and mobile experiences with half the effort

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