The main features of 7-Zip High compression ratio in 7z format with LZMA and LZMA2 compression Supported formats: Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM Unpacking only: AR, ARJ, CAB, CHM...

[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.] TrueCrypt is a disk encryption software for Windows Vista/XP, Mac OS X, and Linux.

PeaZip is free file archiver utility, based on Open Source technologies of 7-Zip, p7zip, FreeArc, PAQ, and PEA projects.

Secure email with absolutely no compromises, brought to you by MIT and CERN scientists. Swiss Based ProtonMail is incorporated in Switzerland and our servers are located in Switzerland.

Glary Utilities offers numerous powerful and easy-to-use system tools and utilities to fix, speed up, maintain and protect your PC.

OpenSSH is a free version of the SSH connectivity tools that technical users rely on. OpenSSH encrypts all traffic (including passwords) to effectively eliminate eavesdropping, connection hijacking, and other attacks.

VeraCrypt is a free disk encryption software brought to you by IDRIX and that is based on TrueCrypt .

Tutanota is a free and open source web-mail client that focuses on privacy and security. It has open source iOS and an Android apps.

ZenMate is an easy to use Browser plugin that provides a VPN solution - encrypting all your browser traffic and routing it through our ZenMate cloud to provide a secure and private browsing experience.

Wire is a secure and private messenger for phones, tablets and desktop. Crystal clear voice and video calls, private group chats, file sharing, audio and video messages - everything is end-to-end encrypted.

The I2P network provides strong privacy protections for communication over the Internet. Many activities that would risk your privacy on the public Internet can be conducted anonymously inside I2P.

Bandizip is a free Archiver for home and office. It handles the most popular compression formats, including Zip, 7z, and Rar files for free!. Bandizip supports for compression and extraction: Zip(z01), ZipX(zx01), TAR, TGZ, 7Z(7z.

TeamDrive offeres the missing link many other Synch&Share softwares lack. With the highest security standards TeamDrive becomes essential when sensitive data is concerned. Via a client useres are able to transfere and share data.

Protect your cloud files with client-side encryption for Dropbox, Google Drive, and others.

Tails is a Debian based live CD/USB with the goal of providing complete Internet anonymity for the user.

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.

Opt out of PRISM, the NSA’s global data surveillance program. Stop the American government from spying on you by encrypting your communications and ending your reliance on proprietary services.

AxCrypt is a simple file encryption software for Windows. It integrates seamlessly with your workflow to encrypt, decrypt, store, send and work with files.

Anyone who has gone through the trouble of setting up a secure website knows what a hassle getting and maintaining a certificate can be.

Tresorit is a security solution for distributed storage systems, and with it a group of users can share secure content without trusting any administrator or third party provider.

Nomadesk is the easiest and most secure way to share, synchronize and backup files wherever you are, online or offline! Nomadesk offers a virtual fileserver that enables both on-line and off-line document management.

Money Manager Ex is a free, open-source, cross-platform, easy-to-use personal finance software. It primarily helps organize one's finances and keeps track of where, when and how the money goes.

PureVPN is much more than your usual VPN services provider. It offers unparalleled security and anonymity, making it your only choice for a secure online browsing experience.

When you need to organize files, DropIt can eliminate much of the drudgery of searching and manually opening folders and moving files around.

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).