Doc-To-Help continues to provide a single source for a variety of document and help types, including a jQuery format targeted for mobile devices.
JSLint checks your JavaScript code for issues before running it and waiting for it to blow up.
If you want to customize the SharePoint 2010 and Office 365 Ribbon, the Add-in Express Ribbon Designer eases UI development in the cloud.
The Telerik Kendo UI framework for HTML5 apps is an excellent product. But even if you like it, should you buy a set of jQuery plug-ins that you can assemble together for free?
The latest edition of the control suite for ASP.NET offers almost every kind of control that a developer would need -- with one-third of the controls supporting ASP.NET MVC.
jqChart for ASP.NET MVC leverages HTML5 to deliver more responsive, scalable charting to the browser -- and throws in an HTML helper for ASP.NET MVC developers.
Memory Profiler provides you with the tools to track down both unreleased and unmanaged resources and to find forgotten references that are soaking up memory.
Aspose.Cells gives you Excel-like functionality in your ASP.NET or Windows Forms application.
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.