The DAPP Network is run by DAPP Service Providers (DSPs), specialized nodes running on top of the blockchain, using IPFS for data storage. Developers and other users may stake the DAPP token for a customizable amount of time to DSPs in exchange for services.
Core Services include:
Services may also be combined for features such as an EOSIO <> ETH token/nft bridge which uses vRAM to store transfer information, LiquidHarmony for fetching new transfers and performing finality checks, LiquidLink (signing ETH trxs), and LiquidScheduler to run the previous 3 services on a repeated interval.
See more examples here:
Zeus is an AntelopIO smart contract developer kit which can be used for creating, testing, migrating smart contracts and much more, check it out.