#1 
A free, fully client-side file encryptor that runs in your browser. Drop in any file, set or generate a passphrase, and it seals the result into its own .vrn format. Nothing is ever uploaded, and it works offline.
E2E encrypted File Encryption
The File Encryption we recommend, filtered to E2E encrypted. See all File Encryption →
#2 
Encrypted notes, tasks, calendar, files, passwords and a journal with mood and medication tracking, all unlocked by one 12-word recovery phrase. Sign up with no email and no password. Open source.
#3 
Cryptomator encrypts your data quickly and easily. Afterwards you upload them protected to a cloud service.
#4 
OpenKeychain is an OpenPGP implementation for Android. It manages your keys and those of your contacts, and integrates with K-9 Mail and FairEmail for end-to-end encrypted email on Android devices.