GitHub - Picocrypt/Picocrypt: A very small, very simple, yet very secure encryption tool.
A very small, very simple, yet very secure encryption tool. - Picocrypt/Picocrypt
https://github.com/Picocrypt/Picocrypt
Cryptomator - Free Cloud Encryption for Dropbox & Co
Encrypt Dropbox, Google Drive, and any other cloud. Cryptomator is free and open source.
https://cryptomator.org
AES Crypt - Advanced File Encryption
AES Crypt is an advanced file encryption utility that integrates with the Windows shell or runs from the Linux command prompt to provide a simple, yet powerful, tool for encrypting files using the Advanced Encryption Standard (AES). A Java library is also available for developers using Java to read and write AES formatted files.
https://www.aescrypt.com
KeePass Password Safe
KeePass is a free open source password manager. Passwords can be stored in an encrypted database, which can be unlocked with one master key.
https://keepass.info
VeraCrypt
VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
https://www.veracrypt.fr