BitcartCC is an opensource project which you can host on your own server in order to receive cryptocurrency payments BTC, BTC lightning network, LTC, BCH, ETH, BNB, all erc20/bep20 tokens (stablecoins too)). It is lightweight by default but you can also use your own node if you want to. It is almost as secure as full nodes as it uses Electrum wallet under the hood. We have a payment processing part where you can easily integrate cryptocurrency payments in any website. Or if you need it, we have developer SDK and a daemon protocol, where you can build custom apps of any complexity - basically a whole development platform with universal APIs across all coins. You can distribute payments between many addresses, check transactions, initiate or watch payments, basically do anything you need. Block explorers, games, wallets? Anything is possible.