Debugging Asp Net Applications With Glimpse And Glimpse Hud

Glimpse is like the FireBug client side debugger, except it’s implemented in JavaScript on the client side with hooks in to ASP.NET on the Server Side.

http://www.hanselman.com/blog/NuGetPackageOfTheWeek5DebuggingASPNETMVCApplicationsWithGlimpse.aspx

There is even a lighter version where it will displays the most important metrics in convenient HUB

http://blog.getglimpse.com/2013/06/11/glimpse-hud-released/