what do you mean by "stock markets" is
this what you mean? because in that case i have not seen any altcoin or even bitcoin to be directly used to buy stocks.
or are you talking about regular trading of altcoins that is not called stock markets, and for the list you can visit coinmarketcap.com or any exchange service.
Yes I wrote wrong

Actually I was thinking about exchange services.
http://coinmarketcap.com/ is the site I'm looking for. Thank you.
Is there a list of new coins except those traded in stock markets?
No, A new coin won't get listed in the crypto exchange.
What is needed to get a new altcoin into trading services?