| 在SharpDevelop裡偵錯工具 SharpDevelop是一個開源的C#整合式開發環境，可以在http://sourceforge.net/project/showfiles.php?group_id=17610&package_id=117376下載到原始碼和二進位可執行檔。目前最新的版本是1.0.3.1768版。
其他開源項目： 一、持久層架構 NHibernate
NHibernate是一個面向.NET環境的針對關係型資料庫的對象持久化類庫。
NHibernate來源於非常優秀的基於Java的Hibernate關係型持久化工具。 NHibernate從資料庫底層來持久化你的.Net對象到關係型資料庫。NHibernate為你處理這些，你不用自己寫SQL去資料庫存取對象。你的代碼僅僅和對象關聯，NHibernat自動產生SQL語句，並確保對象提交到正確的表和欄位中去.大量減少開發時人工使用SQL和ADO.NET處理資料的時間. NHibernate可以協助你消除或者封裝那些針對特定資料庫的SQL代碼，並且幫你把結果集從表格式的表示形式轉換到一系列的對象去。因此對於那些在基於.NET的中介層的應用中，它們實現物件導向的業務模型和商業邏輯的應用，NHibernate是最有用的。
二、日誌工具 log4net
log4net是一個可以協助程式員把日誌資訊輸出到各種不同目標的.net類庫。它可以容易的載入到開發項目中,實現程式調試和啟動並執行時候的日誌資訊輸出,提供了比.net自己提供的debug類和trace類的功能更多。log4net是從java下有卓越表現的log4j移植過來的。它是apache基金資助的項目的一部分。
三、FCKeditor
FCKeditor是一款功能強大的開源線上文字編輯器(DHTML editor)，它使你在web上可以使用類似微軟Word 的案頭文字編輯器的許多強大功能。它是輕量級且不必在用戶端進行任何方式的安裝。
FCKeditor相容 Firefox, Mozilla, Netscape 和 IE。
四、Ajax.NET Professional
Ajax.NET Professional (AjaxPro)是最先把AJAX技術在微軟.NET環境下的實現的AJAX架構之一。它在用戶端指令碼之上建立代理類來 調用伺服器端的方法。
五、NeatUpload
NeatUpload可以讓ASP.NET開發人員把磁碟上的檔案通過流的方式上傳並且可以監視上傳進度 。它是開源的且在 Mono''s XSP/mod_mono和微軟的ASP.NET下運行得一樣好。
包含2個自訂控制項：
*使用者可以通過INPUTFILE選擇一個要上傳的檔案。
*ProgressBar可以用進度條方式或彈出窗方式顯示上傳進度。當JavaScript可用時ProgressBar是用類似AJAX的無重新整理方式展現，但也允許JavaScript停用使用者見到上傳進度。 六、NDoc 【文檔工具】
NDoc 可以將 C#.NET 編譯產生的程式集和對應的 /doc XML 文檔，自動轉換成如 .NET Framework SDK 類庫文檔或者 MSDN Library 線上 .NET 類庫文檔形式的代碼文檔，讓您快速擁有專業級的類庫API 文檔。 七、FreeImage 【多媒體工具】
FreeImage是為開發人員提供的開源類庫項目,它支援多種流行的圖片格式(PNG, JPEG, TIFF, BMP等).FreeImage簡單,易用,快速,多安全執行緒,相容所以32位的windows並且是跨平台的(Linux和Mac OS X).
八、NUnit 【測試載入器】
NUnit一款單元測試架構，它可以應用於遵循.NET架構標準的所有語言下。NUnit最初是從JUnit移植過來的。NUnit完全使用C#編寫且設計時考慮了多數.NET語言的特性,例如自訂屬性和其它反射特性。
九、Freetextbox 【文本編輯】
FreeTextBox 是一個基於 Internet Explorer 中 MSHTML 技術的 ASP.NET 開原始伺服器控制項。這是一款優秀的自由軟體（Free Software），我們可以輕鬆地將其嵌入到 Web Forms 中實現 HTML 內容的線上編輯，在新聞發布、部落格寫作、論壇社區等多種 Web 系統中都會有用途。
十、GmailerXP 【Email用戶端】
GmailerXP是為Google的Gmail服務提供了全套的工具開來源程式。線上所能做的GmailerXP都允許使用者做，它也整合了你任何時候在Gmail需要的其它一些程式的特點(GML, Gmailto,等)。
十一、MagicAjax.NET 【Ajax架構】
MagicAjax.NET是一款在ASP.NET下建立Web頁面提供AJAX技術的架構。它使開發人員很容易把AJAX整合到他們的頁面而不需要替換ASP.NET控制項或自己寫javascript指令碼代碼。
十二、Rss Bandit 【RSS和RDF工具】
Rss Bandit是C#開發的開源RSS閱讀器，它內建多國語系，支援Atom 1.0以及其他各種的RSS feed格式。它畫面漂亮，擁有分頁瀏覽功能，軟體細部設定彈性度高。它的操作畫面直觀簡單易懂，有一個很好的Command模式和ListViewEx來使用，可讓使用者很快的上手。
十三、DockPanel Suite 【其它C#開源項目】
DockPanel Suite是一款開源的.Net Windows Forms開發環境下的停靠控制項(docking)類庫。它模仿Visual Studio .Net的效果開發的。
十四、NPlot 【圖表製作】
NPlot是一款.NET下的開源圖表類庫.它值得稱道的地方是優雅且靈活的API設計.NPlot包含了Windows Form控制項, ASP.NET控制項和一個建立Bitmap圖片的類。還有一個可用的GTK#控制項。
十五、MediaPortal 【多媒體工具】
MediaPortal試圖幫你把電腦變成一個進階的Multi-Media Center / HTPC。它允許你聽你喜歡的音樂&收音機，看你的video和DVD,觀看，確定和記錄實況電視等其它功能。MediaPortal是開源的系統，你可以完全免費的獲得它。任何人都可以幫組開發MediaPortal 或者根據自己的需要把Media Portal 進行調整。
十六、ndCMS 【內容管理系統(CMS)】
ndCMS是 ASP.net (C#)下的一個內容管理系統。它提供了使用者管理，檔案管理，一個WYSIWYG編輯器，範本管理員，拼字檢查和內建的http壓縮。ndCMS的目標是提供一個簡單而快速的方式部署.Net網站以節省你的時間和金錢。
十七、netBPM 【工作流程(workflow)】
NetBPM是JBpm移植到.net平台下的一款開源工作流程軟體。NetBpm可以很容易和.Net應用程式整合在一起,可以建立,執行和管理工作流程序。
Bpm Tool支援將業務模型轉換成軟體模型。業務開發人員可以使用模型驅動的方法設計，實現，執行和跟蹤商務程序。因此開發人員能夠更容易的關注商務邏輯的變化。
十八、NeatUpload 【網路伺服器】
NeatUpload可以讓ASP.NET開發人員把磁碟上的檔案通過流的方式上傳並且可以監視上傳進度 。它是開源的且在 Mono''s XSP/mod_mono和微軟的ASP.NET下運行得一樣好。
包含2個自訂控制項：
*使用者可以通過INPUTFILE選擇一個要上傳的檔案。
*ProgressBar可以用進度條方式或彈出窗方式顯示上傳進度。當JavaScript可用時ProgressBar是用類似AJAX的無重新整理方式展現，但也允許JavaScript停用使用者見到上傳進度。
十九、dasBlog 【部落格(Blog)】
dasBlog是從BlogX 網上日誌引擎發展而來。像Trackback ，Pingback 一樣增加許多附加的特徵，有完整的Blogger/MovableType API支援，API注釋，完整的Radio-style模板定製，支援Mail-To-Weblog/POP3的附件和內嵌圖片，基於WEB的DHTML，OPML，配置的編輯器。 二十、SharpDevelop 【開發工具(IDE)】
SharpDevelop是一個DotNet平台下的免費開發工具，支援C#和VB.NET。 國外C＃開源項目 Open Source Aspect-Oriented Frameworks in C#
- AspectSharp - Aspect# (pronunced as AspectSharp) is a free AOP ( Aspect Oriented Programming ) framework for the .NET Framework, it uses Dynamic Proxies and XML configuration files as basis.
- See all Open Source Aspect-Oriented Frameworks in C#
Open Source Bloggers in C#
- tBlogger - tBlogger provides a complete blog site written in C# with ASP.NET that uses XML as a backend.
- See all Open Source Bloggers in C#
Open Source Build Systems in C#
- NAnt - NAnt is a Ant like build tool for .NET
- See all Open Source Build Systems in C#
Open Source Charting & Reporting Tools in C#
- NChart - NChart provides a wealth of 2D charting for use in business, in education and at home.
- See all Open Source Charting & Reporting Tools in C#
Open Source Chat Servers in C#
- Dot Net Chat server - A Chat Server and Client Application written in .Net FrameWork
- See all Open Source Chat Servers in C#
Open Source Content Management Systems (CMS) in C#
- ndCMS - ndCMS is a content management system written in C# that features a user manager, file manager, a WYSIWYG editor and built-in http compression (for those who are not running at least IIS 6 and/or don't have access to modify your IIS settings directly and/or those who don't want to spend a small fortune on a third party HTTP Compressor). The goal of ndCMS is to provide a quick and easy way to deploy a .net website while saving you time and money.
- See all Open Source Content Management Systems (CMS) in C#
Open Source Code Coverage Tools in C#
- NCover - A test code coverage tool for C# .NET
- See all Open Source Code Coverage Tools in C#
Open Source Forum Software in C#
- YetAnotherForum - Yet Another Forum.net is a opensource discussion forum or bulletin board system for web sites running ASP.NET. It is ASP.NET based with a MS SQL backend database.
- See all Open Source Forum Software in C#
Open Source IDEs in C#
- SharpDevelop - #develop (short for SharpDevelop) is a free IDE for C# and VB.NET projects on Microsoft's .NET platform.
- See all Open Source IDEs in C#
Open Source Installers Generators in C#
- NInstall - A project to produce an open source package that can compete with the commercial installer products
- See all Open Source Installers Generators in C#
Open Source Inversion of Control Containers in C#
- StructureMap - StructureMap is a lightweight Inversion of Control (IoC) Container written in C# for .NET development. StructureMap can improve the architectural qualities of an object oriented .NET system by reducing the mechanical costs of good design techniques.
- See all Open Source Inversion of Control Containers in C#
Open Source Issue Tracking Software in C#
- BugBye - BugBye is a web-based bugtracking system developed using ASP.NET technology and C# as scripting language
- See all Open Source Issue Tracking Software in C#
Open Source Logging Tools in C#
- log4net - log4net is a tool to help the programmer output log statements to a variety of output targets. log4net is a port of the excellent log4j framework to the .NET runtime.
- See all Open Source Logging Tools in C#
Open Source Network Clients in C#
- OpenSmtp.net - OpenSmtp.net is an open source SMTP component written in C#
- See all Open Source Network Clients in C#
Open Source Network Servers in C#
- CSharp Email Server - The C# Mail Server is a C# port of the Java Email Server (JES). JES is an established email server targeted at small centrally maintained installations.
- See all Open Source Network Servers in C#
Open Source PDF Libraries in C#
- iTextSharp - iTextSharp is a library that allows you to generate PDF files on the fly.
- See all Open Source PDF Libraries in C#
Open Source Persistence Frameworks in C#
- OJB.NET - OJB.NET is an object-to-relational persistence tool for the .NET platform.
- See all Open Source Persistence Frameworks in C#
Open Source Portals in C#
- OmniPortal - OmniPortal was built on the idea of having a web-portal-kernel, that could handle security, themeing, and localization.
- See all Open Source Portals in C#
Open Source Profilers in C#
- NProfiler - An application profiler for .NET
- See all Open Source Profilers in C#
Open Source Project Management Tools in C#
- User Story.NET - This project is a tool for Extreme Programming projects in their User Story tracking.
- See all Open Source Project Management Tools in C#
Open Source RSS & RDF Tools in C#
- RSS Bandit - A desktop news aggregator written in C#
- See all Open Source RSS & RDF Tools in C#
Open Source Rule Engines in C#
- NxBRE - NxBRE is the first open-source rule engine for the .NET platform and a lightweight Business Rules Engine (aka Rule-Based Engine)
- See all Open Source Rule Engines in C#
Open Source Search Engines in C#
- Lucene.Net - Lucene.Net is a complete up to date .NET port of Jackarta Lucene
- See all Open Source Search Engines in C#
Source Control Tools in C#
- NetCvsLib - NetCvsLib is a CVS client written entirely in C# for the .NET platform. It is implemented as an assembly, and thus can easily be incorporated into other projects.
- See all Source Control Tools in C#
Open Source SQL Clients in C#
- Database Commander - Database Commander is a database manager with user-friendly interface for Windows operation system.
- See all Open Source SQL Clients in C#
Open Source Template Engines in C#
- NVelocity - NVelocity is a .Net-based template engine. It permits anyone to use the simple yet powerful template language to reference objects defined in .Net code.
- See all Open Source Template Engines in C#
Open Source Testing Tools in C#
- NUnit - NUnit is a unit-testing framework for all .Net languages. Initially ported from JUnit
- See all Open Source Testing Tools in C#
Open Source Web Frameworks in C#
- Maverick.NET - Maverick.NET is a .NET port of Maverick, a Model-View-Controller (aka "Model 2") framework for web publishing. It is a minimalist framework which focuses solely on MVC logic, allowing you to generate presentation using a variety of templating and transformation technologies.
- See all Open Source Web Frameworks in C#
Open Source Web Mail Clients in C#
- SharpWebMail - SharpWebMail is an ASP.NET Web Mail application that is written in C#. It uses a POP3 server as the mailstore and sends mail through a SMTP. It is very simple to configure (Only a few settings in the web.config file). You can compose HTML messages, search your inbox, read complex mime messages and much more.
- See all Open Source Web Mail Clients in C#
Open Source Web Testing Tools in C#
- NUnitAsp - NUnitAsp is a tool for automatically testing ASP.NET web pages. It's an extension to NUnit
- See all Open Source Web Testing Tools in C#
Open Source Wiki Engines in C#
- SushiWiki - SushiWiki is a WikiWikiWeb like Web application written in C#
- See all Open Source Wiki Engines in C#
Open Source XML Parsers in C#
- SAX.NET - SAX dot NET is a C# port of the original Java based SAX API specifications.
- See all Open Source XML Parsers in C#
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