This service currently is free of charge. Consider making a donation if you like it and want to support further development:
Ethereum Classic (ETC):
NEO (ex-AntShares) (NEO):
* You can also donate MaidSafeCoin, Counterparty and Omni (as well as its tokens) to the address since these coins are built on top of Bitcoin.
** You can also donate any Ethereum (ETH) tokens (such as Golem, EOS, Augur, etc) to the address.