I like eNuts. It keeps separated balances for each mint, which is very convenient if you keep different assets. I, for example, keep a small amount of mainnet sats, but also a larger amount of testnet sats.

Other wallets, like Minibits, keep a single balance, which might be fatal if you fail choosing the right mint. I like Minibits, but I think it's a bit behind than other alternatives, like eNuts or cachu.me