Software
Security
Security for computers and digital identity
Anti-Virus, Password Safe
I can no longer recommend the last two commercial products I used and have cancelled my subscriptions (first Trend Micro, then Avast).
I also cannot recommend the annual subscription “Avira Prime” (cancelled).
Anti-Virus for Windows/Mac
Windows
Microsoft's Defender is now as good as, or in some cases better than, its external competitors. Therefore, there is no need for an external solution.
Mac
Apple protects their computers with several techniques.
No need for an external solution.
Independent Security Experts
I recommend to read the tests of the independent provider for services in the field of IT security and anti-virus research AV‑Test GmbH before renewing your subscription or buying a new one.
And you should also read the tests of the independent provider AV-Comparatives.
Not only the Test Result counts
The test instances mentioned above only check the quality of the software! Other things do not influence the test result.
For me it is not only the test result that counts, but also where the company is located and how it deals with customers (data).
Better read negative reviews from other customers before you sign up for a subscription!
Password Manager for Mac
Strongbox Password Safe (Pro)
Strongbox Password Safe is an application for keeping all your passwords safely stored and protected by one master password. Strongbox is a Freemium application with free and pro versions.
Touch/Face ID or use your Apple Watch to unlock your databases for the ultimate in convenience.
Standards compliant, cross platform file format. You own your secrets. Uses the time tested “Password Safe” and “KeePass” File Formats so you can import any existing database you have and export to any other client you need.
Secure, protected by industrial strength Cryptography
Search your entire set of passwords and secrets instantly and powerfully, with deep search. Auto generate secure passwords with configurable generation algorithms.
Developer: Mark McGuill
Basic version: for free, w/o ads. Pro Upgrade: once 27.99 EUR
System requirements: OS X 10.11 or later, 64 bit CPU
Languages: German, English, French, Italian, Ukrainian, Russian, Swedish, Spanish, Simpl. Chinese
Support: via Email (very nice contact to the very competent developer)
Strongbox is also available for your iPhone!

Password Safe for Windows
KeePass Classic Password Safe
KeePass is a free/open-source password manager or safe which helps you to manage your passwords in a secure way. You can put all your passwords in one database, which is locked with one master key or a key-disk. So you only have to remember one single master password or insert the key-disk to unlock the whole database. The databases are encrypted using the best and most secure encryption algorithms currently known (AES-256 and Twofish).
Apart from the installable Windows version, there is a portable version that leaves no traces on the host system.
You can use KeePass on your USB stick, iPod, external hard drive or even CD, on any PC and without leaving any personal information behind.