Hosting Javascript/CSS file on CDN similar to Google hosting jQuery
CDNJS.com allows you to submit a pull request to their GitHub account to get a JavaScript library on their CDN. I've been attempting to get a CSS library added on their forum old and abandoned forum.
If you're comfortable with the Amazon cloud platform, you can use CloudFront. You don't need to use it with S3, but you can.
You can try Amazon AWS CloudFront for quick content delivery. Amazon CloudFront works seamlessly with any origin server, which stores the original, definitive versions of your files.