[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.]
Platforms
- Mac
- Windows
- Linux
United States




Apps similar to FileWall include TrueCrypt, which is free. Other options are GnuPG, Kleopatra, Windows BitLocker and AES Crypt. Disk Encryption Tools like FileWall are a crowded field, with more than 25 alternatives for Windows, Mac, Linux, Android and iPhone.
[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.]




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.



BitLocker Drive Encryption is a data protection feature that integrates with the operating system and addresses the threats of data theft or exposure from lost, stolen, or inappropriately decommissioned computers.




Easily encrypt files with user-friendly software using the powerful AES standard for security on Windows, macOS, and Linux, featuring robust 256-bit encryption for safeguarding sensitive data from unauthorized access, ideal for secure data storage, email transmission, and internet uploads.




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.



FreeOTFE is a free, open source, "on-the-fly" (OTFE) disk encryption program for PCs running MS Windows and Windows Mobile PDAs (FreeOTFE4PDA).




DiskCryptor is a free and open-source utility that offers encryption of all disk partitions, including the system partition. Originally conceived as a replacement for DriveCrypt Plus Pack and PGP Whole Disk Encryption (WDE), the project aims to create the best product in its...




CipherShed is a program that can be used to create encrypted files or encrypt entire drives (including USB flash drives and external HDDs).

EncFS provides an encrypted filesystem in user-space. It runs without any special permissions and uses the FUSE library and Linux kernel module to provide the filesystem interface. You can find links to source and binary releases below.
LibreCrypt (formerly DoxBox) is an open-source disk encryption for Windows and the successor of FreeOTFE
