Bitfinex also plans to support BCC, but under a different ticker: BCH

From their announcement:

Distribution Policy

BCH will be distributed to settled bitcoin wallet balances as of the UTC timestamp of the first forking block, which is expected to occur on August 1st, 2017.

The token distribution methodology will be:

All BTC wallet balances will receive BCH
Margin longs in BTC/USD and margin shorts in XXX/BTC will not receive BCH
Margin shorts in BTC/USD and margin longs in XXX/BTC will not pay BCH
BTC Lenders will receive BCH