Isolator .NET simplifies your unit testing by providing a flexible and convenient way to eliminate dependencies between objects.
NServiceBus can help you create more reliable .NET services. It may not be as "free" as it appears, though.
Infragistics provides a toolkit for creating data-driven applications using client-side code that accesses a variety of data sources, both in the page and back on the client.
If you're documenting your .NET code for other developers, you should follow the standards that Microsoft has developed. Document! X 2011 for Visual Studio will make that job considerably faster and easier.
When all you have is a DLL or an EXE, .NET Reflector will let you recreate C# or Visual Basic code from the assembly. But the real story here is the .NET Reflector integration with Visual Studio.
XapOptimizer can substantially shrink the size of your Silverlight XAP files, giving your users faster downloads. While the result is almost magical, there are reasons to be wary.
Assuming you don't have any beta software installed, what will you get when you apply service pack 1 to your copy of Visual Studio 2010?
WebMatrix may not have a place in your toolbox, but it probably does have a place in your organization -- and it's one you should foster.
TeamPulse provides economical support for teams implementing the Agile methodology, but it doesn't integrate with Visual Studio.
ComponentOne delivers a solid set of business-related controls with all the functionality developers need, but the reporting tools make this suite unique.
Well-integrated environment from SapphireSteel lets .NET developers create Flex applications for the Flash platform.
The controls in the Infragistics Data Visualization package are cool. But you'll need to work through the sample applications to take advantage of them.
The suite continues to deliver tons of controls that Windows Forms developers want to use -- but organization could be improved.
The award-winning component suite is a powerful tool for ASP.NET app development.
This complete package takes care of modeling data and managing the resulting designs -- provided you're using entity-relationship modeling to design your databases.
Red Gate SQL Source Control is a useful tool for SQL Server developers using TFS or Subversion, but falls short in managing database design changes.
Flexera Software InstallShield and Symantec Wise Package Studio target different audiences, providing the services that developers and administrators need to reliably deploy complex applications across an enterprise.
LiveLINQ speeds up LINQ queries against in-memory collections by an order of magnitude -- but before you buy it, make sure you have the problems it solves.
Dundas Dashboard is a turnkey solution for creating customizable dashboards in Silverlight. For developers, the API is most interesting.
Add-in Express simplifies the process of extending Microsoft Office to let you concentrate on adding functionality.