I use Pow to manage my Rails applications. As a consultant I tend to have quite a few Rails applications and bounce between them occasionally. Sometimes I forget what I've named them.
My solution was to leverage Pow's default virtual host with a small app that dynamically
lists/links my other applications. This way I can simply load
http://localhost.dev in my browser
and see the list of other apps, click the one I want and go on my way.
For more information see the Github repository.
If you find this useful, you might also find my Alfred Workflow for Pow handy.