Let's say i'm in a hurry and want to cash out until new ledger nano s arrive.
I want to know for ETH, ETC and LTC how to import on software wallets.
Although I do not understand the exposure of the seed phrase of a wallet with the same security of a cold wallet into a hot wallet, you can download the corresponding wallet for each altcoin and import your seed into the wallet.
For LTC there's LTC Core (the node reference client) and Electrum LTC for desktop (SPV Client). There's also leaf wallet and Coinomi for mobile (Android)
For ETH and ETC you can use MyEtherWallet/Mycrypto, Coinomi, etc.
Coinomi, Jaxx, and Exodus are multicurrency wallets and support a vast array of altcoins.