After 8years CryFS finally released v1.0.0 | pacman 
- How it works : https://www.cryfs.org/howitworks
- Comparison vs other alternatives : https://www.cryfs.org/comparison
- GUI tool for CryFS : SiriKali | AUR
- Android app : DroidFS
Note that it hasn’t received any official security audit yet but “The security of CryFS has been proven in a master’s thesis and in a scientific paper published at DBSec 2017 (PDF) using a game-based security approach. The works also contain a detailed description of the inner workings of CryFS.”