Can someone show me an example rootstock smart contract that is the equivalent of an Ethereum Smart Contract? Coming from Ethereum, is there an example rootstock smart contract code that is the equivalent of an Ethereum smart contract code?
While you are a solidity developer you can write any contract using solidity and compile it and publish it directly to the RSK Smart network using the RSK Console or alternatively using RPC calls like : 

curl -X POST --data '
{
    "jsonrpc" : "2.0",
    "method" : "eth_sendTransaction",
    "params" : [{
            "from" : "0x9e54691b45abfe4552cb03a8247a8da8a3c43d32",
            "data" : "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"
        }
    ],
    "id" : 1
}’ http://&lt;RSKNode&gt;:&lt;RSKNodePort&gt;


the bytecode could be get from solidity browser or using solc.

Edit:  you can configure Remix or truffle to connect to the RSK node and deploy directy your smart contract