1. Ethcon Korea 2023 hackathon winners were announced, featuring various competitions and sponsors.

2. In the Open Track #competition supported by Optimism, RIC Rolling won the first prize, while B52 and ZKP_Circom shared the second prize.

3. Ethereum #Foundation supported projects such as ZKP_Circom, Seonbi, and Handlit, each receiving different amounts of ETH.

4. MetaMask sponsored winners for deploying contracts on Linea, including RIC Rolling, Mandala, and Y.

5. #MetaMask also sponsored a project on Line called Half gallon, and there were awards for the best DApp using MM SDK, which included B52, ChainBreaker, and Paylink.