I know there are ERC20 and ERC223 token standards. Are there any more token standards? What standart is better to use for general purpose cryptocurrency ?
Right now the only widely supported and accepted token implementation is ERC20. If you want your token to be listed on exchanges you will need to use this one.
There's still a hot ongoing debate regarding ERC20 vs ERC223: https://github.com/ethereum/EIPs/issues/223