1. Amazon s3: Object storage built to store and retrieve any amount of data from anywhere. https://aws.amazon.com/s3/. Amazon s3: Object storage built to store and retrieve any amount of data from anywhere. https://aws.amazon.com/s3/.
2. A bridge between the bitcoin blockchain & ethereum smart contracts. http://btcrelay.org/. A bridge between the bitcoin blockchain & ethereum smart contracts. http://btcrelay.org/.
3. Contract address of ethereumlottery.io on etherscan. https://etherscan.io/address/0x302fE87B56330BE266599FAB2A54747299B5aC5B. Contract address of ethereumlottery.io on etherscan. https://etherscan.io/address/0x302fE87B56330BE266599FAB2A54747299B5aC5B.
4. Deposit and redeem btc in defi without intermediaries. https://tbtc.network/. Deposit and redeem btc in defi without intermediaries. https://tbtc.network/.
5. Eos: Blockchain software architecture. https://eos.io/. Eos: Blockchain software architecture. https://eos.io/.