Unfortunately the only one that can be bought on a centralized exchange in the U.S is Serum $SRM available on Kraken Exchange.
A few are on Uniswap if you know how and want to use a Decentralized exchange. I have a relative outside the U.S that buys on Binance and FTX International for me that's why it takes a while to complete the transactions
.A complete list can be found. All Projects building on Solana - solanaproject.com
· All Projects building on Solana. Total Value Locked $2,496,241,733.66; Transactions per second (TPS) 1,434; Total Txn
coingecko.com ............Search Solana ecosystem