Free Digital Signature Software

OpenSSL by ComponentSpot

With the Open SSL 0.9.7c library, developers can write applications that take advantage of Secure Sockets Layer (SSL v2/v3), Transport Layer Security (TLS v1), and a full-strength general-purpose cryptography library. Security features such as data integrity, authenticity, and privacy can be implemented. To compile for Win32, Perl or compiling under Cygwin is required. Some of the encryption routines/algorithms are covered by patents.

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SignGUI by Briggs Softworks

SignGUI is a free graphical front end for Microsoft's SignTool.exe console utility, used by software developers to digitally sign their programs for authentication.

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Chilkat Digital Certificates Component by Chilkat Software, Inc.

Chilkat Certificate makes it easy to get information about the security certificates that are stored on your computer. It also allows you to easily add certificates to a certificate store, remove certificates from a store, or find a certificate that should be used for a particular purpose, such as secure email.

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602XML Form Filler by Software602, Inc.

Fill XSL-FO based XML forms offline, save forms for later completion, and add an X.509 digital signature for authorization. XML data can be delivered by e-mail, HTTP, HTTPS, SOAP or embedded in the XML form. Includes FREE business forms. Supports simple, one-click form export to Adobe PDF.

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Multilevel Digital Signature system for enterprise by Toplen Tech. Ltd.

A facile and efficient digital signing system for enterprise. Electronic file in any format can be signed by many persons, dependency relationship between different signatures can be build, signer's advises can be involved in the signature. RSA key (1024 bits) ensures signature safety and dynamic transport encryption protects transported information. This is a free edition.

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S-Agent by Network Research Lab, Ltd.

S-Mail Agent is a one-step email encryption plug-in for any email software such as MS Outlook, Eudora, Mozilla, Outlook Express, Pegasus, TheBat!, Netscape Mail, etc. Email programs like Outlook are fast and easy-to-use, but they have one serious drawback - your messages are transmitted in plain text, over an open, insecure network and therefore can be read, changed and counterfeited. S-Mail Agent solves this problem! Get secure and handy email!

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Polar Crypto Light Free by Polar

It is an ActiveX control which adds encryption features to your Windows applications.It is easy to use, it encrypts strings, buffers and files. It uses public and private RSA keys for encryption/decryption (256-bit symmetric keys for AES) and provides general process information. Whether you are a beginner or a professional in software development, and you need simple but unbreakable encryption, Polar Crypto Light is the appropriate tool for you.

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