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Showing 137 open source projects for "free"
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Shadowsocks for Android
A shadowsocks client for Android
...Shadowsocks for Android allows you to surf the internet privately and securely at all times through your Android device. It features bleeding-edge techniques with Asynchronous I/O and Event-driven programming. It is completely free and open-source and is available for other platforms as well. -
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Cryptomator
Multi-platform transparent client-side encryption for your cloud files
Cryptomator is a free and open source project that offers multi-platform, transparent client side encryption of your files in the cloud. It works with just about any cloud storage service; is totally transparent so you can work with your files how you normally would; and secure with a 256-bit key length AES encryption. It’s also simple and easy to use with no need for different accounts, key management, cloud access grants or cipher configurations. -
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Cryptol
Cryptol: The Language of Cryptography
...It is used in academic, research, and defense sectors to validate correctness and security through symbolic execution and model checking, ensuring critical cryptographic code is free of design flaws. -
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aws-encryption-sdk
AWS Encryption SDK
...It enables you to focus on the core functionality of your application, rather than on how to best encrypt and decrypt your data. The AWS Encryption SDK is provided free of charge under the Apache 2.0 license. With the AWS Encryption SDK, you define a master key provider (Java and Python) or a keyring (C, C#/.NET, and JavaScript) that determines which wrapping keys you use to protect your data. Then you encrypt and decrypt your data using straightforward methods provided by the AWS Encryption SDK. ... -
Your monitoring isn't a stack. It's a pile. Fix that.Replace Datadog, New Relic, and Sentry without adding three more dashboards.
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AWS Encryption SDK for Java
AWS Encryption SDK
...It enables you to focus on the core functionality of your application, rather than on how to best encrypt and decrypt your data. The AWS Encryption SDK is provided free of charge under the Apache 2.0 license. With the AWS Encryption SDK, you define a master key provider (Java and Python) or a keyring (C, C#/.NET, and JavaScript) that determines which wrapping keys you use to protect your data. Then you encrypt and decrypt your data using straightforward methods provided by the AWS Encryption SDK. ... -
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Digital Signer (a PDF Signing software)
Sign PDF with Digital Signature Software. Batch PDF Sign. DSC Signer.
Digital Signer is a powerful and user-friendly software designed to secure and sign your digital documents with ease. Ideal for Tender filling, individuals, businesses, and professionals, this software ensures that your sensitive documents are protected from unauthorized editing and tampering, maintaining their integrity and authenticity. Key Features Sign PDFs with Hardware Devices: Ensuring the highest level of security. Digital Signature Certificates (DSC): Apply digital... -
7
Hercules_free_version
Almacenamiento seguro offline para semillas BIP39 con cifrado avanzado
HERCULES Crypto Pendrive es una aplicación diseñada para proteger tus semillas de criptomonedas (BIP39) de forma segura y totalmente offline. A diferencia de métodos tradicionales como papel, notas digitales o almacenamiento en la nube, esta solución elimina la exposición a internet, reduciendo significativamente el riesgo de hackeos, malware o accesos no autorizados. El software utiliza cifrado avanzado para garantizar que tu información permanezca protegida en todo momento. Su... -
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WinSCP
WinSCP is a free SFTP, SCP, S3, WebDAV, and FTP client for Windows.
WinSCP is a popular free file manager for Windows supporting SFTP, FTP, FTPS, SCP, S3, WebDAV and local-to-local file transfers. A powerful tool to enhance your productivity with a user-friendly interface and automation options like .NET assembly or batch file scripting. Use WinSCP also for file editing, directory synchronization and site management. WinSCP is open-source and well documented. -
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KeyStore Explorer
Free GUI replacement for Java command-line utilities keytool/jarsigner
KeyStore Explorer is a free GUI replacement for the Java command-line utilities keytool and jarsigner. -
Stop vibe-debugging.AppSignal's MCP server hands Claude, Cursor, or Zed your real errors, traces, and the deploy that shipped them. AI writes the fix; you review the diff.
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VeraCrypt
Open source disk encryption with strong security for the Paranoid
VeraCrypt is a free disk encryption software brought to you by IDRIX (https://www.idrix.fr) and based on TrueCrypt 7.1a. It adds enhanced security to the algorithms used for system and partitions encryption making it immune to new developments in brute-force attacks. It also solves many vulnerabilities and security issues found in TrueCrypt. This enhanced security adds some delay ONLY to the opening of encrypted partitions without any performance impact to the application use phase. ... -
11
JSignPdf
Add digital signatures to PDF documents - GUI and CLI, cross-platform
JSignPdf is a free, open-source Java application for signing PDF documents with digital certificates. It provides a graphical desktop interface for everyday users and a command-line mode for scripted and server-side workflows. Supported capabilities include PKCS#12 keystores, smartcards and hardware tokens (PKCS#11), Windows keystore integration, visible signatures with custom images and positioning, timestamp authority (TSA) support, OCSP/CRL revocation checks, certification signatures, and PDF encryption. ... -
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GpgFrontend
A Free, Easy-to-Use, Cross-Platform OpenPGP Crypto Tool.
GpgFrontend is a Free, Open Source, Powerful, Easy-to-Use, Compact, Cross-Platform OpenPGP Crypt Tool. Also, it's one of the excellent GUI Frontends for Modern GnuPG (gpg). By using GpgFrontend, you can quickly encrypt and decrypt text or files. You can also digitally sign your text or files.GpgFrontend does not need to depend on any server, therefore it may be one of the last lines of defense in protecting your privacy. -
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Protect my docs
Protect My Docs is a free watermarking tool for PDF and i
Protect My Docs is a free watermarking tool for PDF and image files. Add a fully customizable text watermark with AES-128 encryption, ZIP AES-256 export, and mail optimization. No Python installation required. Available for Windows, macOS, and Linux. -
14
mendelson AS4
AS4 Solution for ENTSOG, e-SENS, ebMS, PEPPOL, ICS2, BDEW
mendelson AS4 is a free JAVA-based open source AS4 solution. Contains a monitoring- and configuration GUI (SWING), supports PUSH and PULL messages, ENTSOG AS4, e-SENS AS4, ebMS AS4, BDEW AS4, PEPPOL AS4, ICS2 AS4, signatures (SOAP, payload), selectable profile per trading partner, encryption (SOAP, payload), UserNameToken, TLS, pluggable into any servlet container, trading partner management, compression, certificate management -
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eMark
Free and open-source PDF signing and verification application.
eMark is a free and open-source PDF signing and verification application – a powerful Adobe Reader alternative that enables you to securely sign, verify, timestamp, and protect PDF documents using: 🔑 USB tokens and HSM (PKCS#11) 📜 PKCS#12/PFX certificates 💻 Windows certificate store Works seamlessly on Windows, Linux, and macOS with an Adobe Reader-like interface featuring professional signature verification capabilities. -
16
1654 — encryption system
1024-bit encryption system (functional safe or disk) | С++20
...Dependency-free design The entire cryptographic surface is auditable in-tree. PetoronHash as the cryptographic core All key material derivation, diffusion, and internal transformations are driven by PetoronHash 1024-bit wide internal state The architecture uses a wide internal state to increase diffusion depth and structural safety margins. -
17
ProxyCryptGUI
An easy to use 'front-end' to ProxyCrypt 3.X encryption application
ProxyCryptGUI2025 • ProxyCryptGUI2025 is a free application that provides a Windows GUI (graphical user interface) for ProxyCrypt to manage encrypted virtual disk drives. • The setup file for ProxyCryptGUI2025 includes the required setup of ProxyCrypt 3.x and required AIM disk driver. • All files stored in an encrypted virtual drive can be accessed just as any files on regular disk drives but only after the drive is mounted/opened with the associated passphrase -
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Crypto Notepad Plus
Advanced notepad with functions of protection
Crypto Notepad Plus is a free text editor with advanced encryption features. Also you can generate code snippets in various programming languages. Its use is governed by the GPL (GNU General Public License). Tested on Windows operating systems, from version 7 to 11. -
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ProxyCrypt
Encrypted volumes through command line
ProxyCrypt is a command line tool that creates encrypted volumes within a file or a hard drive. Encryption and decryption are made on the fly, allowing you to use encrypted volumes like normal ones. Designed for paranoids and advanced users, it is also fast, very lightweight, open source and easy to recompile. See the features below. It works as a "proxy" for the AIM driver or the ImDisk driver. AIM driver is included in the full package. See the documentation for more informations... -
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PetoronHash-System
PHASH | post-quantum XOF hashing algorithm | C++20
PHASH is a self-contained, dependency-free, post-quantum XOF hashing algorithm implemented in modern C++20. This release delivers the first fully stable production implementation of the PetoronHash-System — a 1600-bit sponge-based hash function with domain separation, extendable output, and deterministic behavior. Key Features No external dependencies — pure C++20 implementation. -
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Naeon
The safest way to store private data in untrusted (cloud) environments
Naeon secures data in untrusted off-site storage through a layered approach: files are compressed, then AES-256 encrypted with a randomly generated 128-character passphrase yielding approximately 762 bits of entropy — far beyond the reach of both classical and quantum brute-force attacks. The ciphertext is obfuscated by prepending and appending random byte blocks, making the result unidentifiable as an encrypted file. The payload is then sharded into one private chunk — holding the... -
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Password Keeper + Generator
Free portable cross-platform graphical multi-user password manager
Free portable cross-platform multi-user password manager, 100%-pure Java. DB for each pkg-user is encrypted and protected by pkg-user hash. In addition - passwords in DB are stored in encrypted form. In result - stored passwords are double encrypted ! Passwords of pkg-users are not stored in program - stored and compared only hashes. Support md2, md5, sha1, sha256, sha384 and sha512 hash. -
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antigift
antigift is simple cross-platform, files & folders encryption tool
antigift could be used for encryption files & folders on USB-flash or HDD partition. Works on Linux (including Android), Windows, Mac OS X, FreeBSD, DragonFly BSD and other on OSes. Do not required installation. Include WIPE tool for wiping free space and tool for recovery forgotten key. See documentation at http://sourceforge.net/p/antigift/wiki/Home/ antigift простой и кросс-платформенный инструмент для шифрования файлов и папок(с ccrypt в качестве основы) Подробности см. на страничке с русской документацией http://sourceforge.net/p/antigift/wiki/rus/ -
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bitcrypt
BitCrypt is a free ultra-strong encryption that hides text in bitmaps.
BitCrypt is an elegant encryption that allows for the storage and transmission of information in an undetectable manner. The program processes a user-supplied text encrypting it with the Rijndael cipher and storing it in a user-selected bitmap image. This later step is called steganography, which means "to hide invisibly". If you intend to store sensitive information invisibly, you may encrypt it with BitCrypt and keep it in a picture image. Alternatively, if you intend to pass... -
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Media-Cert
A Easy To Use Encryption Tool.
The Re-launch is now ready and live. Feel free to try and enjoy it out. Should you experience any issues just create a ticket and I will look into it asap. The previous issues with security have been fixed, however the entire .MCF file format has since changed The public repository has some features removed for security purposes. You will need to add your own
