CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.
CarrierWave - Solution for file uploads for Rails, Sinatra and other Ruby web frameworks.
Amazon CloudFront - Amazon CloudFront is a content delivery web service.
Uppy - The next open source file uploader for web browsers
CDN77 - Content Delivery Network - website speed acceleration with CDN77. 28+ PoPs, Pay-as-you-go prices, no commitments.
tus.io - File Uploads