Alvas.Net: Offers .Net components including Alvas.Suite, Alvas.FileControls, Alvas.ShapeForms, Alvas.Controls, Alvas.Scriptor, Alvas.Labels.
ASPBridge: Component for including ASP code in ASP.NET pages.
Aspose: Provide .Net components including Aspose.Excel, Aspose.Word, Aspose.Pdf, Aspose.Chart, Aspose.Spell, Aspose.Recurrence, Aspose.License.
ASPPainter: .NET component can be used to create new and edit existing images. Complete source code is available for developers. Free and commercial versions.
BFC MultiLang .NET: A .NET open-source library providing XML-based multi-lingual support for .NET applications and web-applications. It introduces grammatically correct plural phrases.
BFC MultiTheme .NET: A .NET open-source project for multi-themed websites. It can dynamically load themes and their settings. It can be integrated with BFC MultiLang .NET for multi-lingual themes.
BlackBytes Registry for .NET: Provides classes that manipulate the system registry.
BlackBytes Software & Consultancy, Ltd.: Develops .NET components including: Security for .NET, Registry for .NET, DNS for .NET, NetworkTime for .NET, Whois for .NET, TimeZoneConverter for .NET, FTP for .NET.
ByteSize Barcodes: Allow add barcodes to Windows Forms or Web Forms applications. It support the most common symbologies used today including Code 39, Code 128, EAN.UCC 128, UPC-A & UPC-E, EAN 13, EAN 8, Code 11, Code 93, Codabar, Interleaved 2 Of 5, and Standard 2 Of 5. By XHEO.
CenterSpace NMath: .Net components suite contains interfaces to BLAS and LAPACK, random number generators, anova, regression, probability distributions, sparse matrices, hypothesis tests and descriptive statistics.
Coalesys, Inc.: Focusing on .ASP.NET User Interface controls.
commandLine .NET: Execute DOS/console commands from within .NET. Returns output, the DOS return code, and completion status. By AS-Pro Software.
decloak: .Net components including: dual listbox with re-ordering, dependent listboxes, click click e-mail reports.
developerFood: Directory of ASP.NET and Widows Forms controls and components.
Devshock .NET EventMonitor: Component for notification of events in application. All information is queued and transfered in standard XML format. With this model the application thread is not blocked.
Devshock .NET ThreadPoolManager: Offer an easy way to manage the .NET ThreadPool.
DotLucene: A powerful search engine for .NET applications. Port of Jakarta Lucene. [Open source, Apache Software License]
EaseSoft Barcode: .Net Windows Forms control and ASP.NET control for creating barcode images.
etive.com: Provides .NET components to use in both ASP.NET websites, and winform applications. Including dotEtiveFTP, dotEtiveSocket, dotEtiveTreeListView, etiveAspPack, etiveCreditCard, etiveDNS, etiveMessenger, etiveWHOIS.
Extreme Optimization: Numerical components for .Net includes complex numbers, vectors and matrices (BLAS and LAPACK), numerical integration and differentiation, solving equations, curve fitting, special functions, statistics.
fyiReporting Software's RDL Project: A fully functional report and charting system based on Microsoft's Report Definition Language (RDL). [Open source, GPL]
Industrial DOT NET, Inc: Local IO assembly provides generic access to instrumentation data.
InRule .NET Rule Engine: A rule engine that provides a framework for non-technical logic maintenance and deployment within server, web-based, and desktop applications.
KineticaRT: A collection of .Net components, including Windows .NET Forms сontrols, logic components, server components.
Lanap BotDetect: .NET control to protect website from spambot (form robots) with asp.net captcha code image. ASP.NET security solution to prevent automated registrations.
NLinAlg: A .NET class library for working with algebra structures such as matrices and vectors. [Open source, GPL]
Olvio IT PlusSuite: Include .Net controls, editor controls, layout manager, notification controls.
Parole Lite: Generate pronounceable passwords. By 4ASPNET.
Patnorsoft: Email sending, receiving, retrieving via SMTP and validation.
PortSight Secure Access for .NET: Manages users and their access to WinForms and WebForms applications, Web Services and Web content. It features user roles, permissions, auditing, delegation and import from Active Directory.
PortSight Task Scheduler for .NET: Immediate or planned execution from ASP.NET. It allows processing of long-running ASP.NET pages, running command line utilities or other server-side tasks without page time outs and under a privileged account.
Quantum Whale: Editor.NET component is an advanced code editor allowing integration of a highly flexible edit control in your .NET applications; Outbar.NET is a component pack allowing incorporate a side bar control into any .NET applications.
Real Components .NET: .NET components for ASP.NET and Windows .NET applications includes IIS Manager, RSS Manager, Credit Card Validator, Web Header Manager. [Shareware]
Registry Toolkit .NET: Extends the functionality of the Microsoft registry classes. By ComponentSpace.
Security for .NET: Implement managed role-based security for .NET Framework. The Security for .NET enables you to manage Windows security.
SSDN: Simple Service Discovery for .NET: An open source service discovery mechanism for .NET remoting. Also provides a simple naming and directory service.
Subsembly: .NET components based on e-Banking standards (FinTS, HBCI), e-Government standards (OSCI) and smart cards (PC/SC, CT-API).
Trace Listeners .NET: A cyclic file trace listener. By ComponentSpace.
USPExpress Math Parser .NET: Parse and evaluate scientific, engineering and mathematical expressions on-the-fly. BY Unisoft Plus, Ltd.
WebCab Components: .Net components for financial and mathematical applications.
WireFactor: Provide BusinessComponent to load an XML schema to a DataSet at design time and pre-built business objects based on BusinessComponent architecture including Order, Credit, Party and Enums components.
XHEO Licensing: Secure declarative licensing for .NET. Using RSA public-key encryption the license files stay secure and unaltered by the end user.
Xtras.Net: An online reseller of third party .NET components.
ZXValidator: .NET component for credit card numbers validation. It currently supported credit card types: Visa, MasterCard, Amex, JCB, Diner's Club, Discover/Novus.