Safe: Encrypted File System!

VeraCrypt is a free disk encryption software brought to you by IDRIX and that is based on TrueCrypt .It adds enhanced security to the algorithms used for system and partitions encryption making it immune to new developments in brute-force attacks.For example, when the system partition is encrypted, TrueCrypt uses PBKDF2-RIPEMD160 with 1000 iterations whereas in VeraCrypt we use 327670. And for standard containers and other partitions, TrueCrypt uses at most 2000 iterations but VeraCrypt uses 655340 for RIPEMD160 and 500000 iterations for SHA-2 and Whirlpool. »

[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.]

Cryptomator provides transparent, client-side encryption for your cloud. Protect your documents from unauthorized access. Cryptomator is free and open source software, so you can rest assured there are no backdoors.

A fork of the now-discontinued TrueCrypt. CipherShed is a program that can be used to create encrypted files or encrypt entire drives (including USB flash drives and external HDDs). There’s no complicated commands or knowledge required; a simple wizard guides you step-by-step through every process.

Disk Utility is the name of a utility created by Apple for performing disk-related tasks in Mac OS X. These tasks include:

No encryption of dynamic disks, but command-line-encryption! Dynamic disks must be converted to basic disks with EasyUS Partition Master or Partition Guru before encrypting with Bitlocker. Windows BitLocker & "Bitlocker To Go" Drive Encryption is a data protection feature in Windows 10 Professional, Windows Vista Enterprise and Windows Vista Ultimate for client computers and in Windows Server 2008. BitLocker protects against data theft or exposure on computers that are lost or stolen, and offers more secure data deletion when computers are decommissioned. Bitlocker To Go (BTG) is essentially Bitlocker for external drives. It’s full volume encryption for all your USB drives: http://blogs.msdn.com/b/rockyh/archive/2009/03/01/bitlocker-to-go.aspx »

LibreCrypt (formerly DoxBox) is an open-source disk encryption for Windows and the successor of FreeOTFE

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

This is an experimental project of porting encfs to the Windows world.

Safely encrypt sensitive dataOn PCs, in networks and in the Cloud

The Gostcrypt project has been launched at the end of 2013 as fork of the (late) Truecrypt project.

CyberSafe Top Secret is an information security program that uses modern encryption algorithms (RSA, AES, BlowFish, etc.). The assortment of tools and features provided by CyberSafe Top Secret are valuable in all fields that work with information: protecting confidential information, protecting E-mail correspondence, creating and validating digital signatures.CyberSafe Top Secret supports encryption on the basis of Public Key Infrastructure, and allows you to encrypt computer hard drives partitions, create encrypted virtual drives of any size, and also hide logical disks and encrypted files and folders on the user’s computer. »

Safely encrypt sensitive dataOn PC, in networks and in the Cloud

This app eases the use of mounting (loading) encrypted partitions (also called Volumes), a disk drive may consist of several of those areas, usually represented by a drive letter. If those partitions are encrypted by TrueCrypt or VeraCrypt and other apps based on TrueCrypt, they can be marked to have a password box shown, if they get connected with the computer. This will happen in the background, because the encrypter will be instructed to mount (load) it. Showing and managing the encrypted partitions is what this app does. To encrypt partitions, you need the respective encrypter (preferably VeraCrypt). Multilanguage. »