VS2010 extension for displaying type definition on hover

I used to have an extension which made it so that when you hover over a variable or a type in the code editor, a popup would show the type definition (similar to the class view and object explorer) as well as allowing you to navigate to derived types, base types, generic parameter types, etc.

Does anyone know which extension I'm talki开发者_Go百科ng about? Or know of a similar one? I've looked all over VS Gallery :(

Hi I think I have the same and I have only installed DPack and PowerTools from MS on my VS 2010 box.