wallet.txt

https://medium.freecodecamp.org/how-to-build-an-ethereum-wallet-web-app-ac77dcaac573

https://bitcointalk.org/index.php?topic=2050660.0

https://github.com/manuelsc/Lunary-Ethereum-Wallet

https://github.com/walleth/walleth

https://web3j.io/

https://github.com/ethereum/wiki/wiki/Light-client-protocol

https://medium.com/ethereum-mist/the-future-of-ethereums-mist-browser-layered-nodes-and-beyond-54dd1e70d375

https://ethereum.stackexchange.com/questions/18461/how-can-dapps-work-on-smartphones

https://etherworld.co/2018/03/13/understanding-ethereum-light-node/

https://www.parity.io/what-is-a-light-client/