IPFS

eth.limo is a gateway that serves ENS-named, IPFS-hosted frontends over ordinary HTTPS, such as yourname.eth.limo. Teams shipping an IPFS frontend point users at their eth.limo address so a normal browser can load it.

Pinata is an IPFS pinning and file upload service used to host NFT metadata and images for contract projects. Teams upload assets there so token metadata stays available after mint.

Irys, formerly Bundlr, is a JavaScript SDK for permanent and programmable data storage built on Arweave. Applications install it when data should be paid for once and kept indefinitely.