[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.]
- - TrueCrypt is the most popular Windows, Mac & Linux alternative to OneTime.
- - TrueCrypt is the most popular Open Source & free alternative to OneTime.
The development of TrueCrypt was ended in 5/2014 after Microsoft terminated support of Windows XP. Windows 8/7/Vista and later offer integrated support for encrypted disks and virtual disk images. Such integrated support is also available on other platforms. You should migrate any data encrypted by TrueCrypt to encrypted disks or virtual disk images supported on your platform.
GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications.
Gpg4win enables users to securely transport emails and files with the help of encryption and digital signatures. Encryption protects the contents against an unwanted party reading it. Digital signatures make sure that it was not modified and comes from a specific sender.
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).
- - AES Crypt is the most popular Android, iPhone, iPad & Android Tablet alternative to OneTime.
Encrypto lets you encrypt files before sending them to friends or coworkers. Just drop a file into Encrypto, set a password, and then send it however you normally would — but this time with added security. It’s free for both Mac and Windows.
AxCrypt is a simple file encryption software for Windows. It integrates seamlessly with your workflow to encrypt, decrypt, store, send and work with files.
Android Privacy Guard (APG) is a free and open source application for Android devices, created by Thialfihar, that lets you encrypt and decrypt single files or emails. Its goal is to provide a similar .Discontinued
This project was discontinued in favor of OpenKeychain on September 10th, 2017.
Platform-independent password-based authenticated encryption of files & folders.
File Lock PEA Features
LibreCrypt (formerly DoxBox) is an open-source disk encryption for Windows and the successor of FreeOTFEDiscontinued
Last release Nov 24, 2015https://github.com/t-d-k/LibreCrypt/releases