There are 2 repositories under impermanent-loss topic.
Tools for use in DeFi. Impermanent Loss calculations, staking and farming strategies, coingecko and pancakeswap API queries, liquidity pools and more
A minimalistic, easy to use IL calculator for curve.fi
Periphery code to interact with GammaSwap smart contracts in v1-core
Calculate expected Impermanent loss for Uniswap V3
Simple farming calculator