The software that I think would be useful for beginners/non-tech savvy users
- VPN
- Password Manager
- Anti-virus software
- Two-Factor Authentication app
But beginners can bring more risk to themselves if they do not use the right ones. Example is using a free VPN that can result to more ways that malware can be downloaded and leading to hackers compromising wallet device and wallet to steal coins, or their data sold by the free VPN providers to third party to display more ads.
Also I will recommend beginners to know the difference between Tor and VPN and to know how Tor is better, especially while maintaining privacy or anonymity on noncustododial wallets.
Antimalware can be of help but I will recommend unlock original too as ETFbitcoin recommend it.
Using of 2FA that are close source is not recommended if there are open source ones like Aegis and Tofu. Also beginners must know they should not have their 2FA all on the same device they have their wallet or what they used the 2FA for.