Free Encryption Software

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