Honeyswap is a fork of Uniswap V2 deployed on xDai. The core code has not been modified, helper contracts have been deployed and maintainer fee has been enabled and directed to a contract which converts fees into Honey and deposits into the 1hive common pool.
You can find full documentation of the code and information about the deployment in the honeyswap documentation.
Exchange: https://honeyswap.org
Analytics: https://info.honeyswap.org
Liquidity Incentives: Soon