ShareX + IPFS = Screenshot sharing.

IPFS' MFS subsystem = Sharing big files with my friends without having to first drop it into NextCloud and then generating a link and stuff. It's much, much faster.

I mainly use it for storage and CDN-ish stuff. But, there are far more usecases. For instance, it can establish a p2p connection and even do TCP traffic. I'd love to experiment running a Nostr relay through IPFS, for instance! :)