Files in different projects and even files within a project can have the same names. In this case their tabs also have the same titles and one need to hover the mouse over the tabs to distinguish them by tooltip with the full path. Disambiguator add-in detects when two or more tabs have the same title and adds Visual Studio folder or project to titles for these tabs.
Disambiguator monitors TabCreated event, searches if tabs with the same name without extension already exist and adds TitleTransform to tabs found except if tab already has TitleTransform with the [Disambiguator] tag. The TitleTransform prefixes the title with the Visual Studio folder or project name (if document is not within a folder). A web site project has a full path as its name, so Disambiguator uses only last directory name in the title in this case.
Download Disambiguator v1.0.0 for Tabs Studio v1.5.7.
Tabs Studio Blog (organizing Visual Studio document tabs) 
This is great! Especially for ASP.NET MVC projects where there is an Index.aspx view for just about every controlloer. I can’t wait to try it! Thanks.
Comment by Lance Fisher — September 2, 2009 @ 9:56 pm