Extensibility Studio is a complete solution allowing you to extend your .NET application with user-defined logic. It provides a set of tools allowing users of your applications to write code for mini-programs (scripts) to enhance existing or define new logic by accessing and manipulating application objects, build visual user interfaces for these scripts and debug them with a fully-featured debugging engine.

Visual Assist X dramatically reduces application development time with key new features and improvements to existing features in Visual Studio, allowing you to: Visual Assist increases automation, simplifies navigation and displays vital information as you develop. The features are so well integrated into the IDE that it is difficult to distinguish what Visual Assist X provides and what is built into the IDE. One thing is certain, you like your IDE more when Visual Assist X is installed. Visual Assist X provides assistance for all of the programming languages of Microsoft Visual Studio 2005 and Microsoft Visual Studio .NET, including C/C++, C#, ASP, Visual Basic, Java and HTML. The product also offers assistance for C/C++ users of Microsoft Visual C++ 6.0 and 5.0.

PostSharp is the #1 pattern-aware extension to C# and VB. It allows developers to eradicate boilerplate by offloading repeating work from humans to machines. PostSharp contains ready-made implementations of the most common patterns and gives you the tools to build automation for your own patterns. Developers usually think in terms of design patterns, but with conventional programming languages, they end up writing boilerplate code. PostSharp extends the C# and VB languages with a notion of pattern. The result: shorter, cleaner code that’s easier to write and understand, contains fewer defects and is less expensive to maintain.

EasyQuery ASP.NET Core

EasyQuery allows you to integrate end-user-oriented query builder into your ASP.NET Core project.

Friendly, natural language query builder UI: users do not need to know about your tables, links, fields or any other DB-related things.
.NET Core 2.0 is supported.
Works with Entity Framework Core 2.0.
Supports any database that has a .NET Core connector.
Targets .NET Standard 1.3 and 2.0.

GemBox.Presentation is a .NET component that enables you to read, write, edit, convert, and print presentation files from your .NET applications using one simple API. With GemBox.Presentation you get a fast and reliable component that’s easy to use. It requires only the .NET framework, so you can deploy your application easily without having to think about other licenses. And it’s up to 20 times faster than Microsoft PowerPoint automation!

ServiceStackVS is ServiceStack's official VS.NET Extension containing the most popular starting templates for ServiceStack powered solutions. Each project template supports ServiceStack's recommended multi-project structure promoting a clean architecture and Web Services best practices.

ServiceStack.Text .NET's missing high-performance utility belt. Deep inside all of ServiceStack's premium libraries lies a high-performance core containing all of ServiceStack's super text powers. Centered around .NET's fastest full-featured JSON Serializer is a convenient utility belt containing 100's of extensions enhancing .NET's built-in String, Stream, Bytes, List, Dictionary, Reflection, Task, WebRequest types and more.

SmartAssembly is a .NET obfuscator, error reporting, and feature usage reporting tool designed to help .NET developers produce better quality applications. This all-round solution will obfuscate and protect your .NET code, and add powerful error-reporting and feature-usage reporting capabilities to your application.

Business platform Xafari is intended for development of powerful business-oriented applications. It uses state of the art flexible platform DevExpress XAF. Xafari Framework is a set of components that extend and complement DevExpress XAF.

Components for viewing, navigating, text extracting and editing PDF files.
uses PDFium open-source PDF rendering engine
available for .NET 2 - 4.7
source code included in registered version
royalty free distribution in applications