Ongoing Core-Geth development work, with several upstream patches, a fix of consensus bug in Etchash, and improved dialogue between the Core-Geth and Hyperledger Besu clients.
Initiated Erigon development work, a Go-Ethereum fork that reduces bloat: Full synchronization on ETC took a few days, and used about 160 GB.
Ongoing Hyperledger Besu development work, with 7 releases.
Full deployment and launch of Gnosis Safe to ETC mainnet and Mordor testnet: Ethereum Classic Safe