I used Coinomi which worked fine. As the forks get ever more poxy you might have to change wallet to access the more obscure ones. I ended up using Bitpie/Bither for stuff like Bitcoin Diamond.
Whatever you do make sure your BTC leaves the wallet with that private key before claiming any other forks. And since it's conceivable you can derive a seed from an individual private key you'll need a new seed on your Keepkey if you return your BTC to it.
You can get the private key from a seed with this -
https://github.com/iancoleman/bip39 and then import it into another wallet.