1)   ContextView Pro 2.0
Convenient and powerful extension for Windows Explorer that saves time by allowing you to preview over 60 image, animation, video, and audio file formats and perform a variety of advanced operations directly from any right-click context menu.

 2)   PicaView 2.0
PicaView is a Windows Explorer add-on that gives you all the functionality of an image viewer, mpeg viewer, jpeg viewer and movie viewer right from the Windows right click menu. You can even right click an mp3 or WAV file and hear it instantly!