Here is a list of various blockchain explorers for popular cryptocurrencies:
Bitcoin:
blockchain.com
blockchair.com
btc.com
explorer.btc.com
Ethereum:
etherscan.io
ethplorer.io
blockchair.com/ethereum
blockscout.com/eth/mainnet
Binance Smart Chain:
bscscan.com
bsc-explorer.com
bscscan.org
Ripple (XRP):
xrpscan.com
xrpl.org
bithomp.com
xrplorer.com
Litecoin:
blockchair.com/litecoin
chainz.cryptoid.info/ltc
explorer.litecoin.net
Cardano:
cardanoscan.io
cardanoexplorer.com
Polkadot:
polkascan.io
polkadot.subscan.io
Stellar:
stellar.expert
steexp.com
Dogecoin:
dogechain.info
doge.tokenview.com
Tezos:
tzstats.com
tzkt.io
Please note that this is not an exhaustive list, and there are many more blockchain explorers available for different cryptocurrencies.
When searching for a specific blockchain explorer, consider including the name of the cryptocurrency along with "blockchain explorer" in your search query to find more options.