Gnosis Builders Resources includes project ideas, workshops, guides, tools, directories, and recommended things for builders https://github.com/Gnosis-Builders/Resources
Gnosis Chain Official Documentation https://docs.gnosischain.com/developers
Recommended Things for Builders
Gnosis Faucet - This faucet is the official xDai faucet for Gnosis Chain. Access the faucet to get a small amount of xDAI that can get you started in building and deploying transactions on Gnosis Chain. You can claim 0.01 xDAI on Gnosis mainnet and 0.1 xDAI on Chiado testnet via the faucet.
Gnosis Chain Recommended Bootnodes https://docs.gnosischain.com/about/networks/mainnet/#config-repo
Gnosis Chain Gas Tracker https://gnosisscan.io/gastracker
You can auto-config your wallet on Gnosis mainnet via https://chainlist.org/chain/100
You can auto-config your wallet on Chiado testnet via https://chainlist.org/chain/10200