A friend asked to share with the habrasoobschestvom addon Solution Navigator for Visual Studio, which allows you to quickly go on projects. The bottom line is that when you have a lot of projects in a solution and there is a need to go to a particular one by its name, then when a few projects have been closed, navigation becomes nontrivial. Especially if the projects are arranged in subfolders.
Solution Navigator solves this problem in the following way:

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In a sense, the task is simplified by R #, but when it is not present, this plugin will be usable. As in some other cases. In general, I think the audience will be there :)
Kamenty and bugs can be posted either here or on the project page:
http://solutionnavigator.codeplex.comPS So far, it has been tested only on VS 2008.
UPD: In VS 2005 does not work, the author will finalize.
UPD2: Added support for VB, J #, CPP projects.