Lots of new tools have been released in the past week so I thought I'd compile a list:
VSTO 2005 SE
Visual Studio Tools for Office 2005 Second Edition - allows you to create add-in projects fo Excel, InfoPath, Outlook, PowerPoint, Visio, and Word
.NET 3.0 RTM
The Microsoft .NET Framework 3.0 - contains WPF, WCF, WF, and CardSpace
Visual Studio 2005 Extensions for Workflow
Allows you to create workflow projects
Visual Studio 2005 Extensions for WCF/WPF (November CTP)
Support for XAML intellisense, WPF/WCF project templates, and a preview version of visual designer for WFP
Visual Studio 2005 Extensions for Windows SharePoint Services 3.0 (November CTP)
The long awaited project templates for SharePoint V3 customizations. Includes project/item templates for Web Parts, Site & List Definitions, custom fields, and content types
VSTA (CTP)
Visual Studio 2005 Tools for Applications - "provides a rich .Net platform to create add-ins for your applications using C# and VB"
ASP.NET AJAX Beta 2
Better known as Atlas - allows you to create rich, interactive, data-driven web applications
Virtual PC 2007 CTP
Available via Microsoft Connect, this version supports Vista as both the guest and host operating system and hardware virtualization
Virtual Server 2005 R2 SP1 - Beta 2
Also supports hardware virtualization but doesn't support Vista just yet