ETCDEV team maintains Classic Geth, a main client for the ETC blockchain and has contributed original projects, such as; Emerald Platform, to help others develop on the ETC blockchain; Emerald Wallet for end users and SputnikVM as a standalone, modular, embeddable and IoT ready EVM.
Ethereum Classic is an independent community driven blockchain continued after EF (a foundation originally started Ethereum blockchain) moved to a separate fork by introducing censoring transactions into their blockchain. Ethereum Classic community opposed that fork and kept original chain, because it believes in principles of blockchain.
We’re maintaining and adding new features to the go-ethereum client (Geth). This is a reference implementation of Ethereum Classic protocol, written - you guessed it - in Go.