Google Sheets as a Sidechain! Send Sheetcoin with an Email and Google OAuth (plus a "trusleash" Ethereum bridge)
A standardized way of sending push notifications to Ethereum wallets. ERC-2365.
Get exposure to DeFi black swan events via synthetic tokens
zkSNARKS On-chain Confidential Transactions with Smart Contracts
Proxy-reencryption implementation for mobile devices
An ETH wallet that users don't have to install to run dApps
... with Ethereum, Local DNS and Radical Markets
A world's first at ETHBerlin: Ethereum transactions signed with a government issued ID.
Classic “Battleships” game with state updates governed by the zkSNARK, in Plasma