CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.
Statically - The free optimization & CDN for images, CSS, JavaScript, and open source.
Amazon CloudFront - Amazon CloudFront is a content delivery web service.
jsDelivr - A free, fast, and reliable Open Source CDN for npm and GitHub with the largest network and best performance from all OSS CDNs. Serving 100 billion requests per month.
KeyCDN - KeyCDN is a high-performance Content Delivery Network (CDN). Lowest price globally at $0.04/GB with HTTP/2 Support and free Origin Shield.
raw.githack.com - raw.githack.com serves raw files from github.com with proper Content-Type headers (like rawgit.