Another tool I think is a good idea to include in the encryption software section.
GpgFrontend it is pretty much self explanatory 
BUT, this is the best GPG frontend I saw since the old Seahorse in the early 2000’s… (yes I loved Seahorse)
You can manage your keyring, encrypt files, text, fantastic piece of software.
I’m installing it to test.
Currently my favourite is Kleopatra (shipped with GPG4Win). Kleopatra - KDE Applications
Ok, it’s quite as complete as Kleopatra, but it does litterally everything we may need and make everything easier.
Very good for begginers
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