With that out of the way, here are
your top five, in no particular order:
- VeraCrypt (Windows/OS X/Linux)
- AxCrypt (Windows)
- BitLocker (Windows)
- GNU Privacy Guard (Windows/OS X/Linux)
- 7-Zip (Windows/OS X/Linux)
Five Best File Encryption Tools - Lifehacker
https://lifehacker.com/five-best-file-encryption-tools-5677725
VeraCrypt. Free encryption for everyone.
AxCrypt. Encryption for small teams and individuals.
Folder Lock. Effective encryption for individuals.
CryptoExpert 8. Powerful protection indeed.
CertainSafe. A quality cloud-based solution.
Top 5 best encryption software tools of 2018 | TechRadar
https://www.techradar.com/news/top-5-best-encryption-tools