Technorati Class Library (API) for Microsoft .NET web sites and applications (C#, VB.NET, ASP.NET). Enable applications to search for blogs, find links to blogs, query for blog info, etc.

Movable Type Class Library (API) for Microsoft .NET web sites and applications (C#, VB.NET, ASP.NET). Download recent posts, fetch blog trackback information, fetch/update post categories and download blog category lists.

Yahoo! Site Explorer API .NET Class Library for Microsoft .NET web sites and applications (ASP.NET, C#, VB.NET). Enable apps to find Seiten indexed by the Yahoo! search engine; find the inbound links as counted by Yahoo.

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 Allgemeine Public License.

Popular XML parser for C#, VB.NET, and ASP.NET

MetaWeblog .NET Programmierung API for managing blogs. It enables applications to create new blog posts, edit existing posts, retrieve blog information, and upload media objects.

Provides a Blogger 1.0 Microsoft .NET Programmierung API for managing blogs. It enables applications to create new blog posts, edit existing posts, retrieve blog information, and delete blog posts.

Xceed Zip for .NET is a 100% managed data compression and all-purpose file manipulation class library for .NET. It provides flexible zip, unzip, streaming, self-extracting and an innovative and extensible filesystem object model.

PlusSuite is a control library containing custom controls and components to be used with the Microsoft .Net Framework and integrated with Visual Studio.NET. All controls are extensible, flexible and easy to deploy.

SWF To Image library is a freeware ActiveX Programmierung library for converting SWF into BMP, JPG, GIF images from Visual Basic, Visual Basic.NET, ASP, ASP.NET, Visual C++, Visual C# Programmierung languages.

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.

100% managed version of ZLIB compression library. Full C# source code is included.

Manages library (book lending & returning etc.) records in a password-protected way. Has an adder to add up to 40 later-modifiable numbers each even multiplied by a factor (say, 1 or 2).

A digital audio processing class library for .NET that lets developers create their own sound filters or use the ones implemented by the author, such as Gain, Delay, and Reverb, as well as the ability to read and write .WAV files.

Test the online state of any ICQ user and returns 1 for online and 0 for offline. Registered at CPAN.

Blogger 2.0 API .NET component for managing blogs at blogger.com. Can download blogs, retrieve information, create new blogs and posts, edit posts, and delete posts.

Lumisoft’s UI Controls 0.11 contains over a dozen basic flat controls for Windows Forms apps. The controls can be configured using the Property tab in VS.NET, but lack advanced WYSIWYG design-time support and databinding. Seems somewhat buggy.

Net Phone is a free downloadable net phone which enables you to make calls from pc to pc, pc to mobile and pc to landline.Call Any Phone any Where Free by Watching Videos

Net Phone is a free downloadable net phone which enables you to make calls from pc to pc, pc to mobile and pc to landline.Call Any Phone any Where Free by Watching Videos

RSS .NET Component: Enable your application to easily consume or create RSS feeds. Provides unified feed parsing support for RSS 0.9x, RSS 1.0, and RSS 2.0.