Gears is a Rust implementation of the Cosmos SDK. The full functionality of the Cosmos SDK has not yet been implemented however Gears can be used to create basic Blockchains.
This (part) implementation of a Cosmos Hub (Gaia) node shows how Gears can be used to build a Blockchain.
Work on Gears is primarily funded through AZKR research. AZKR are using Gears to build AZKR-chain which is a unique web3 ecosystem to help DAOs achieve mass adoption. Their dashboard demonstrates how Gears can work seamlessly with existing Cosmos ecosystem tooling, in this case the ping.pub dashboard.