The good folks at Railsware do it again. A little while back they released a Mac OSX client called PivotalBooster, and just today they released a very slick Pivotal Tracker Chrome extension called PiRo.
It’s a multi-login/multi-story/multi-project gem (I mean that in the sparkly sense) that lets you do all these things from within the same window. In other words, a multipass for Tracker (you know, Mila from the Fifth Element, “Leeloo Dallas mul-ti-pass”).
It also looks great. Give it a shot and if you like it, be a good Tracker citizen and vote up our friends with your stars!