dogecoin and litecoin at the moment. others scam altcoins are just bagholders trying to make some noise so they can dumps, included but not limit to monero, dash(digital ass), and nxt etc... etc...
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Dogecoin is a joke, plus with the way the infinite inflation is set, it will never gain value save for some pump and dumps.
More than $ 100,000,000.00 has been invested in that "joke" so far verses just over $ 9,000,000.00 for Monero.
Yes Dogecoin is 133 days older but in that timeframe Monero will most likely find about $100k, as things stand.