Security toolkit with strong encryption and authentication. Supports many algorithms for symmetric/asymmetric encryption, authentication, and hashing. Free for non-commercial/shareware projects. Written in C. ActiveX and C++ wrappers are available.
The FreeTextBox control provides a WYSIWYG HTML editing environment for ASP.NET (Web Forms) Web pages. Visitors can edit text and click on buttons to format their text. The control is written in C# and has many options for customization.
Bossware?s SMTPClient is a .NET SMTP client for adding outgoing email to apps and to Web pages. It doesn?t use .NET?s resource-hungry System.Web.Mail, which is merely a wrapper for CDONTS and CDOSYS. Written in 100% managed C# and CLS compliant.
The .NET Framework lacks support for some network protocols. With Smilla?s .NET Communication Library, developers can add NNTP to their .NET apps. It is written in C# and is distributed under the GNU Lesser General Public License.
SharpZipLib is a free, open-source compression library for .NET. It supports Zip, Gzip, Tar, and Bzip2. Also computes checksums. Currently lacks Zip file splitting/spanning, custom self-extracting Zip files, and reading/writing to memory.
OpenSSL is a cryptography toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) network protocols and related cryptography standards required by them.
MFC classes to add flat, non-3D, “water-color” Office XP-style UI controls to MFC apps. They have no raised edges, do not look “pushed in” when clicked, and are not “shadowed” (except for menus).
FTP component written in C#. Brings basic FTP support to the .NET Framework.
12+ flat controls for Winforms. Lack WYSIWYG design-time support, databinding.
zlib is designed to be a free, general-purpose, legally unencumbered -- that is, not covered by any patents -- lossless data-compression library for use on virtually any computer hardware and operating system
SourceGrid is a basic .NET grid control. It allows simple data to be displayed without relying on XML. Useful for simple apps, it lacks databinding, WYSIWYG design-time and printer support, as well as grouping and master/detail capabilities.