Cryptographic Software
What software tools are there to help keep my information safe from prying eyes?
PGP
What is PGP? Pretty Good Privacy or PGP is a hybrid crypto system combining some of the best features of both conventional and public key cryptography.
The combination of the two encryption methods combines the convenience of public key encryption with the speed of conventional encryption. Conventional encryption is much faster than public key encryption. Public key encryption in turn provides a solution to key distribution and data transmission issues. Used together, performance and key distribution are improved without any sacrifice in security.
What is OpenPGP? OpenPGP is the free open source version of PGP
International PGP home page, for freeware versions of PGP outside of US, including source code. Includes many foreign language translations of PGP and manuals.
AESCrypt
AES Crypt is a file encryption software available on several operating systems (Windows, Mac, and Linux) as well as a cross-platform Java edition, that uses the industry standard Advanced Encryption Standard (AES) to easily and securely encrypt files. You do not need to be an expert to use AES Crypt, nor do you need to understand cryptography.
Xecrets-Ez - File Encryption
Xecrets Ez is a file encryption app to protect your local or cloud service files from prying eyes.
Encrypt with maximum strength AES-256 open source software. View and edit with ease. Use on macOS, Windows or Linux.
7-Zip
7-Zip is not only a file archiver with a high compression ratio. It features strong AES-256 encryption in 7z and ZIP formats and the archives will self-extract (that is, it does not need 7-Zip to be installed to extract the archive contents) in the 7z format.
For Windows but works on Linux with WINE installed
002 Encryption Tools
002 for Windows is a file encryption system that uses the AES Encryption Algorithm. The Advanced Encryption Standard (AES), also known as Rijndael, is a block cipher adopted as an encryption standard by the U.S. government. It has been analysed extensively and is now used worldwide
Veracrypt - Disc Encryption
Free open-source disk encryption software for Windows, Mac OS X, and Linux