PowerCommands for Visual Studio 2008

PowerCommands for Visual Studio 2008 is definitely one of the best plug-ins available for Visual Studio..

http://code.msdn.microsoft.com/Release/ProjectReleases.aspx?ProjectName=PowerCommands&ReleaseId=559

Includes things like:

Undo closed window

Collapse all projects

Copy path

Email CodeSnippet

Insert GUID from right-click menu

Copy and paste project references!

Open containing folder

Open command prompt

Unload project

Sort using statements / also removes un-used ones

And more..