Looks like Microsoft application marketplace people are not paying enough attention because myriad pirated application have made their appearance in the Windows Phone Marketplace. Here is the list of few applications along with links to stolen apps.
 Original App Name: ConnectMe, Publisher: CRTVAPPS
Stolen App Name: Remote Pc pro, Publisher akishah786
 Original App Name: Flash Videos, Publisher Atef Shehata
Stolen App Name: Flash Videos pro, Publisher akishah786
 Original App Name: IM+, Publisher: SHAPE GmbH
Stolen App Name: All in one messenger, Publisher akishah786
 Original App Name: Tube Download, Publisher: Lovo Apps
Stolen App Name: Video Downloader pro, Publisher akishah786
This will cause a panic among the WP developers or to those who are planning to make a great app for windows phone devices. We suggest users to take note of this and contact the original app publisher to get the illegal app down as soon as possible.
A commenter on reddit says,
They are downloading and illegally modifying the XAP.
It has been said by many the reason why developers love windows phone is there is no piracy in its app store. This will definitely cause a panic among the developers.