1、RSS.NET
http://www.rssdotnet.com/
http://sourceforge.net/projects/rss-net/
RSS.NET is an open-source .NET class library for RSS feeds. It provides a reusable object model for parsing and writing RSS feeds. It is fully compatible with RSS versions 0.90, 0.91, 0.92, and 2.0.1, implementing all constructs.
2、Atom.NET
http://atomnet.sourceforge.net/
Atom is a new syndication format (similar to RSS in functionality) but aimed to simplify the task with a simple and clear specification.
Atom.NET is an open source library entirely developed in C# aimed to handle Atom feeds in an handy way.
It provides an object model to write and parse Atom feeds. It's compatible only with the 0.3 Atom draft specification.
3、ZedGraph
http://zedgraph.org/
http://sourceforge.net/projects/zedgraph/
ZedGraph is a set of classes, written in C#, for creating 2D line and bar graphs of arbitrary datasets. The classes provide a high degree of flexibility -- almost every aspect of the graph can be user-modified. At the same time, usage of the classes is kept simple by providing default values for all of the graph attributes. The classes include code for choosing appropriate scale ranges and step sizes based on the range of data values being plotted.
4、Magic Library
http://www.dotnetmagic.com/
- A Collection of user interface controls for Windows.Forms
- Can be used for free, even in commercial applications
5、Lucene.Net
http://www.dotlucene.net/
- Very good performance
- Ranked search results
- Search query highlighting in results
- Searches structured and unstructured data
- Metadata searching (query by date, search custom fields...)
- Index size approximately 30% of the indexed text
- Can store also full indexed documents
- Pure managed .NET in a single assembly
- Very friendly licensing (Apache Software License 2.0)
- Localizable (support for Brazilian, Czech, Chinese, Dutch, English, French, German, Japanese, Korean and Russian included in DotLucene National Language Support Pack)
- Extensible (source code included)
- Lucene.Net is a port of Jakarta Lucene to .NET (C#) maintained by George Aroush
- Project home: http://incubator.apache.org/lucene.net/
- Index is compatible with the Java version (Lucene)
6、SgmlReader
http://www.gotdotnet.com/Community/UserSamples/Details.aspx?SampleGuid=B90FDDCE-E60D-43F8-A5C4-C3BD760564BC
SgmlReader is an XmlReader API over any SGML document including HTML and OFX for example. A command line utility is also provided which outputs the well formed XML result. HTML is an SGML grammar, so you can use this tool to convert HTML into well-formed XML.