Any app that can play wmv files?

Hi, like some other users here, I'm facing the inability to open my wmv attachments in my mail -which is quite frustrating considering that most of my friends are windows users. I know iPad doesn't support wmv and some other windows video files, but isn't there any app that can get around this problem? I searched Appstore and one of the results I got was called AirvideoFree but dumb 'ol me can't understand how it works. Their website doesn't help much either. Any answer (in simple to follow steps) is welcome. If this app is not what I'm looking for-is there any other available?