I don't want to sound like an ass, but if you don't have the ability to use google or search the forums to find this answer yourself, you probably shouldn't be investing in crypto, as you'll need to do far more DD than this to properly invest in altcoins. To answer your question, poloniex and bittrex are what you're looking for. Kraken has left a lot of potential revenue on the table by not listing certain coins like NEM. Their loss.
It is always best to ask question. There are some benefits for it. 1. It saves you from searching in googles and read lots of result which is quite time consuming. 2. You can always have an extra insight from the reply. Just like yours
. This is why most prefer asking than researching things on their own. And by the way, better choose bittrex than poloniex, polo was acting shady this past few weeks.