Alternatives to stunnel for all platforms with any license

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  • OpenSSH icon

    OpenSSH

    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. Additionally...

    Open Source Mac Linux iPhone BSD iPad Haiku Xfce

  • ZenMate icon

    ZenMate

    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. Forget internet restrictions! We...

    Commercial Mac Windows Web / Cloud Android iPhone Android Tablet iPad Vivaldi Browser Chrome Maxthon Yandex.Browser Opera Chromium Firefox

  • Tails icon

    Tails

    The Amnesic Incognito Live System (Tails) is a Debian based live CD/USB with the goal of providing complete Internet anonymity for the user. The product ships with several Internet applications, including web browser, IRC client...

    Open Source Linux

  • Let's Encrypt icon

    Let's Encrypt

    Anyone who has gone through the trouble of setting up a secure website knows what a hassle getting and maintaining a certificate can be. Let’s Encrypt automates away the pain and lets site operators turn on and manage HTTPS with...

    Open Source Self-Hosted

  • OpenSSL icon

    OpenSSL

    OpenSSL is a framework which implements the secure socket layer. It ships with a program/library which gives you access to all those functions. With this program you can create, check or view x509 certificates. Furthermore you can...

    Open Source Mac Windows Linux Haiku

  • BoxCryptor Classic icon

    BoxCryptor Classic

    Boxcryptor Classic is the first product of the Boxcryptor family to secure data in the cloud - officially released in 2011. It grew from a solution originally specific for Dropbox with basic features, to one that supports all main...

    Freemium Mac Windows Linux Android iPhone Chrome OS Windows RT Windows Phone iPad Kindle Fire

  • Boxcryptor icon

    Boxcryptor

    Boxcryptor is an easy-to-use encryption software optimized for the cloud. It allows the secure use of cloud storage services without sacrificing comfort. Boxcryptor supports all major cloud storage providers (such as Dropbox, Google...

    Freemium Mac Windows Android iPhone Chrome OS Windows RT Android Tablet Windows Phone iPad Blackberry 10

  • wicd icon

    wicd

    Wicd is an open source wired and wireless network manager for Linux which aims to provide a simple interface to connect to networks with a wide variety of settings.

    Open Source Linux Xfce

  • GnuTLS icon

    GnuTLS

    GnuTLS (the GNU Transport Layer Security Library) is a free software implementation of the SSL, TLS and DTLS protocols. It offers an application programming interface (API) for applications to enable secure communication over their...

    Open Source Windows Linux

  • Steadycrypt icon

    Steadycrypt

    This is a Java-based application that allows the user to important files that are on that operating system to encrypt easy and secure and organize. Tested on WinXP, Win7 & OS X 10.6

    Open Source Mac Windows

  • ImmediateCrypt

    ImmediateCrypt is an utility for encryption and decryption of plain text messages with the AES-256 cipher. It is released under the GPLv3 license (full Java source available) and works under any Java-enabled environment (Windows...

    Open Source Mac Windows Linux

  • mbed TLS icon

    mbed TLS

    The mbed TLS library is a dual licensed (GPLv2 or proprietary) implementation of the SSL and TLS protocols and the respective cryptographic algorithms and support code required. Stated on the website is that mbed TLS aims to be...

    Free Mac Windows Linux Android BSD

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  • east-tec SafeBit icon

    east-tec SafeBit

    east-tec SafeBit is the perfect electronic vault you need for your privacy. It features on-the-fly AES encryption, by creating virtual encrypted disk drives, where you can hide files and folders, keep them encrypted all the time, but...

    Commercial Windows

  • gevent

    gevent is a coroutine -based Python networking library that uses greenlet to provide a high-level synchronous API on top of the libev event loop. Source code : https://github.com/gevent/gevent

    Open Source Mac Windows Linux Python greenlet

  • beame-insta-ssl icon

    beame-insta-ssl

    beame-insta-ssl is open-source and free to use! It makes it easy for any web developer to make use of encryption - and get secure communications. beame-insta-ssl will get you your very own fully-qualified domain name under the...

    Open Source Mac Windows Linux Web / Cloud

  • Network Security Services

    Network Security Services (NSS) comprises a set of libraries designed to support cross-platform development of security-enabled client and server applications with an option support for hardware SSL acceleration on the server side and...

    Open Source Mac Windows Linux

  • Themis

    Themis is a data security library, providing users with high-quality security services for secure messaging of any kinds and flexible data storage. Themis is aimed at modern development practices, with high level OOP wrappers for...

    Open Source Mac Windows Linux Android iPhone iPad

  • NCrypt

    NCrypt provides you the power to encrypt the data BEFORE it gets stored on our site. All encryption/decryption is done on the client end using AES-OFB 256bit with a hash key generated on each paste. The server will only store the...

    Open Source Web / Cloud

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  • DocWallet icon

    DocWallet

    Your personal document lock box. Securely stored and always at hand. You can finally access your confidential documents from anywhere in the world - securely encrypted, perfectly synchronized, and amazingly practical - with...

    Free Mac Windows iPhone iPad

  • Cryptix icon

    Cryptix

    Cryptix is a complete solution to study cryptography, encoding and ciphers. Hide your datas, encrypt your texts and documents. Cryptix contains password generators, Mnemonic, .htpasswd generator, RSA 512 bits key generator...

    Commercial Mac

  • Cryptext icon

    Cryptext

    Cryptext helps you secure your writings and notes easily. Cryptext use AES algorithm to protect the content of your texts. Features : - AES encryption of your texts. - Choice of two AES methods for encryption and decryption. -...

    Commercial Mac

  • Arpwatch

    arpwatch is a computer software tool for monitoring Address Resolution Protocol traffic on a computer network. It generates a log of observed pairing of IP addresses with MAC addresses along with a timestamp when the pairing appeared...

    Open Source Web / Cloud

  • SharkSSL icon

    SharkSSL

    The SSL/TLS and Certificate tutorial for Windows enables you to fast track your understanding of the SSL/TLS protocol, Certificate Management, and secure communication. The download includes many C source code examples, including a...

    Free Personal Windows

  • wolfSSL icon

    wolfSSL

    wolfSSL offers an embedded SSL implementation that is portable, progressive, and easy to use with products including the wolfSSL embedded SSL library and the wolfSSL Embedded Web Server.

    Open Source Mac Windows Linux Android iPhone Android Tablet BSD iPad

  • SecureBlackbox icon

    SecureBlackbox

    SecureBlackbox is a library (suite of components and classes) for software developers that allows them to provide secure data transfer and storage, digital signing and verification, encryption and compression (please refer to EldoS...

    Commercial Mac Windows Linux Android iPhone Android Tablet iPad

  • ScramDisk for Linux - SD4L

    SD4L is a suite of Linux tools and a graphical user interface (GUI) which allow the creation of, and access to ScramDisk encrypted container files. In particular, SD4L provides a Linux driver which enables mounting ScramDisk...

    Open Source Linux

  • OpenConnect icon

    OpenConnect

    A VPN client compatible with Cisco AnyConnect VPN Client (now Cisco AnyConnect Secure Mobility Solution) and an open source substitute for Cisco's official Linux client. Main features: - Support for IPv4 and IPv6; connection...

    Open Source Mac Windows Linux Android BSD

  • Cryptolab icon

    Cryptolab

    CryptoLab is a freeware cryptography application for Microsoft Windows, and incorporates text-based encryption / decryption through the use of plug-in cipher modules. Advanced features include SMTP email support, a Key Manager and...

    Free Windows

  • abylon BASIC icon

    abylon BASIC

    The security of sensitive data is often neglected. But the encryption of diaries, pictures or other secret documents is so simply. abylon BASIC is a collection to encrypt, sign, compress, search, copy, mail or move files and folders...

    Commercial Windows

  • CocoaAsyncSocket

    Asynchronous socket networking library for Mac and iOS

    Open Source Mac Windows iPhone iPad

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