Visual Studio 2010 Vertical Line Guides

This Visual Studio extension assists you with creating vertical line guides in your IDE editor.  The typical registry hack that worked in old versions of Visual Studio didn’t work for me until I installed this extension.  Then it automatically recognized the registry hack I created.  This extension allows you to create guides by right clicking in the editor window and selecting “Add guideline” so you no longer have to manually edit the registry to add or remove guides.

http://visualstudiogallery.msdn.microsoft.com/en-us/7f2a6727-2993-4c1d-8f58-ae24df14ea91