One of the first requirements for professionals on the go is that you know where you are and where you're going. Google Maps will not only show you the former, it'll tell you how to get to the latter. It comes preinstalled on the iPhone and is available as a free download for Android and BlackBerry.
Here we've collected 17 mobile apps that will serve any busy professional when they're out and about. These apps may not be purely business, but that doesn't mean they can't do something useful. Whether you need to buy movie tickets, find a restaurant or get home at the end of the evening, these apps will do the job. Most of the apps we've chosen are available for all three major smartphone platforms; in a couple of instances, there are minor difference between versions. On top of that, most of them are free. So download and get out on the town.