The NoUSB.co desktop client lets you turn any file(s) or folder on your PC into a direct download link with a simple right-click. No third-party storage, no p2p IP leak; just a relay that streams your files directly to your peers. When you stop sharing, the link stops working, leaving nothing stored on external servers.
Mostly exists because it felt weirder and weirder to store private files on Dropbox/Google Drive/whatnot just to share them. And because some professions need this.