Ethereum Name Service - Like DNS, but for Ethereum wallet addresses
Uppy - The next open source file uploader for web browsers
Elph Plasma - Highly scalable blockchain infrastructure for Ethereum
Filestack - Simple file uploader and robust APIs for uploading, transforming, and delivering any file into your app. Filestack is a collection of tools and powerful APIs that make it simple to upload, transform, and deliver content.
How DNS Works - Super cute web comics about 'How DNS Works' for beginners!
Uploadcare - File uploading, media processing & content delivery for modern web apps