Actually I'm not aware if there already is another wallet than the one Factom developed. As far as I know it's planned to get FCT added on ledger but I don't know when that will happen. But the Factom wallet is a really good one.

Enterprise-Wallet: https://github.com/FactomProject/distribution (it's not necessary to download the binaries, just the Enterprise)
Documentation: https://docs.factom.com/#enterprise-wallet

Blog-Post about the Wallet: https://www.factom.com/blog/encrypted-enterprise-wallet