Visual Studio Express - http://msdn.microsoft.com/vstudio/express/ Free, but limited editions of Visual Studio 2005 for a single programming language supported by .NET.
DataKwikWatch - http://workspaces.gotdotnet.com/DataKwikWatch Add-In to Visual Studio.NET for viewing data objects in a datagrid during debug mode.
Codify - http://www.workstate.com/codify A code generation add-in for Visual Studio.NET. It allows replace repetitive code patterns in projects. By Workstate Technologies.
RADvolution Designer - http://www.developguidance.com/ An integrated RAD tool for Visual Studio.NET with drag&drop layout engine technology, control naming convention and .NET components and controls. Allows fast design of forms and applications. By DevelopGuidance.
C-Sharpener For VB - http://www.elegancetech.com Automatically converts VB.Net projects to C# projects through a Visual Studio .Net Add-in. It typically converts 99% of your VB source code and all other project related files. By Elegance Technologies.
FeinSoftware - http://www.feinsoftware.com/ Providing development tools for Microsoft Visual Studios.
TestDriven.NET - http://www.testdriven.net/ Unit-Testing add-in for Visual Studio .NET fully integrated with all major unit testing frameworks including NUnit, MbUnit, csUnit and Visual Studio Team System.
Visual Paradigm SDE for Visual Studio - http://www.visual-paradigm.com/product/sde/vs/ Allows generate .NET source code from UML model directly, or reverse engineer existing code into the model for further enhancement.
StudioSpell - http://www.keyoti.com/products/studiospell/ Spell checker Add-In for Microsoft Visual Studio .NET checking web-page Html and strings in source code.
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