Besides Bitfinex, which crypto currency exchange(s) have Trailing Stop Loss I was using Bitfinex until they stopped allowing U.S. clients.

They are the only exchange I know that has a Trailing Stop Loss feature.

Are there any others?

It's very dangerous to ones portfolio to trade cryptos without stop loss functionality if you cannot stay glued to your screen all day long. And a normal stop loss is too rigid to work well in the very volatile crypto environment.
Kraken have the real deal, where one can set stop-loss based on %, but their trading platform has been a bit unreliable lately.   

Bistamp also have trailing stop-loss, but very low on selection of coins.