eth-sign

var ethUtil = require('ethereumjs-util');
var ethTx = require('ethereumjs-tx');

var privkey = "";
var privBuff = new Buffer(privkey, "hex");
var msg = ethUtil.sha3("The Times 03/Jan/2009 Chancellor on brink of second bailout for banks");
var sign = ethUtil.ecsign(msg, privBuff);
console.log(sign);
var signedHash = ethUtil.toRpcSig(sign.v, sign.r, sign.s);
var sigDecoded = ethUtil.fromRpcSig(signedHash);
console.log("SigDecoded", sigDecoded);
var recoveredPub = ethUtil.ecrecover(ethUtil.sha3("The Times 03/Jan/2009 Chancellor on brink of second bailout for banks"), sigDecoded.v, sigDecoded.r, sigDecoded.s);
var recoveredAddress = ethUtil.addHexPrefix(ethUtil.pubToAddress(recoveredPub).toString("hex"));
console.log("Recoverered Addr", recoveredAddress);