In order to help you during the coming hardfork of the 1st August, you can find below a list of exchanges and wallet which will support the Bitcoin Cash.
Exchanges :
Bittrex
Kraken
Bithumb
Bitfinex
Via BTC
LiveCoin
KCoin
BTCBOX
Kex
Mercury Cash
Huobi
Toubi
CoinFloor
Quadriga CX
Korbit
BtcPop
QuoinExchange
HitBTC
BitcoinsNorway
Exodus (do not supports but will permits to get Bitcoin Cash’s privates keys)
Wallets :
Ledger
BTC.Com
Bitcoin ABC
Bitcoin classic
Trezor
ElectrumCash
BitcoinUnlimited
AirBitz
List of exchanges which do not accept Bitcoin Cash
Coinbase
GDAX
Bitmex
Bitstamp
ItBit
Poloniex (leaves the decision up in the air)
These lists are not exhaustive, in the view of the large numbers of exchanges and wallets.
We recommend you to send your Bitcoins as soon as possible to the safest exchanges and wallets: Bittrex, Kraken, Ledger and BTC.com