iConcertCal (iPhone)

From iConcertCal:

Just like our iTunes plugin, our iPhone app brings you a personalized, concert calendar so you can easily find out when your favorite bands are playing shows in your city.

If any of the artists in your music library are playing in your area, they will automatically show up in a "My Shows" list. A separate list called "All Shows" will let you browse through any and all concerts in your city.

Each concert listing has links to purchase tickets; an email option to send a reminder to yourself or to alert your friends about a concert; a built in map to the venue with directions; and a preview button that will allow you to listen to what each of the bands sound like to help you decide if you want to go.

You can also look for concerts by browsing specific venues. Venues can be sorted by distance or by name. If you find a concert with an artists that you like, you can add the artist to your personal artists list on the fly by clicking on the white star above the concert. If you turn the app on its side, you will see a full calendar month view which makes it even easier to find shows on a particular day of the week.