First, you must decide what coins do you refer to, the new projects, or listed coins.
if you are looking at some new coins from new projects (ICO/IEO, and other fundraising projects), you may search for in these followings:
https://icoholder.com/https://icodrops.com/https://cryptopotato.com/ico-list/and many others. But noted, never only believe in their reviews, you must do your own research to the entire information and data of the projects, including teams, and others.
But, if you are looking for the coins that have been listed, you can use the trackers. the most used trackers are likely:
https://coinmarketcap.com/https://www.coingecko.com/enhttps://www.cointracker.io/https://www.cryptocompare.com/Well actually there are still many crypto trackers, but those are most I commonly use. Hopefully can help you. You can find the lists of the coins, its website, exchange, ranks, and other information on the tracker website. Additionally, you can compare the results among the websites in order to get better details and data. But once more, you must do your own research in order to take the best crypto to pick.