jsDelivr is a free, open source, high-performance CDN (Content Delivery Network) for delivering JavaScript, CSS and other static assets. It is used to improve the performance, scalability and availability of web applications and websites. It works by caching static assets and serving them from multiple global locations, reducing latency and providing better performance. jsDelivr offers a unique set of features including: automated asset optimization, caching, and delivery, making it a great choice for developers wanting to improve their web applications. jsDelivr also supports many popular libraries and frameworks such as jQuery, Angular, React, Vue and more.
Google Hosted Libraries
KeyCDN
CoralCDN
Microsoft Ajax CDN
Discontinued no longer works