EtherShare is a contract to share information with permanent storage and open access.
The website is not the only one entry to EtherShare. EtherShare is a DAPP. So you can download the html files to your own server or access the contract in other ways.
The contract address is 0xc86bdf9661c62646194ef29b1b8f5fe226e8c97e, 0x475de1f3e1ba5aeefc9fc694852c8fce59b353a1, 0x28daa51dc3d80a951af9c451d174f0c7156c6876, 0x43820f75f021c34ce13ded1595633ed39b79ab47