Few questions here:

Im interested in some simple OP_Return functions, are there any altcoins that have made use of this to encode hashes?

I know of proofofexistence, secretcoin, cryptograffiti etc but are three any examples that make use of daemon as opposed to blockchain.info api?

Last of all, has Bitcore received support for PoS coins yet? (I know blackcoin and PIGGY were porting)

Thanks!