AirPlayer is an application for streaming video, music, and photos from UPnP/DLNA media servers to your Apple iPhone, iPod, or iPad. With AirPlayer, you can access your media files on your Windows 7 directly, allowing you to watch your movies even outside of your house.

One of the main features of AirPlayer is its compatibility with various media formats. With iPhone 3gs, iPhone 4, iPod generation 3 32G/64G, iPod 4G, and iPad, you can stream almost any formats of video and music from your media server, including XVID, AVI, RMVB, MKV, MOV, MP4, M4V, MP3, WMA, OGG, and AAC. Even with older iPhone/iPod models, you can still use the QuickTime plugin to view limited media formats.

AirPlayer also offers support for photo browsing, thumbnails, and showing snapshots of media files. It includes a search function and supports the Airplay feature. The application provides automated media server discovery on the local network, and you can also add servers manually to watch your movies outside of your house.

Overall, AirPlayer is a versatile and user-friendly app that allows you to stream media from UPnP/DLNA media servers to your Apple devices with ease.