Hit my exchanger and learn more about this exchanger called as TowerX.

They have more than 500+ coin pairs to be listed and the exchanger gets listed by 31st August. This is exact mode of Binance with their own token called as TBE. So I guess this can be your great start point if you really want to look for newest exchangers for some reason.

But despite of that I will recommend you to watch Binance and Huobi, they are my favourite and also having wide array of altcoins.