iTunes for Windows: All your music and entertainment in one place!
Standalone easy-to-use video editor
Bring Media to Life with Video Editor & Slideshow Maker
Microsoft Tackles Audio and Video Devices with Zune
iTunes
Windows Essentials
Microsoft's essential apps to get you started
Adobe Premiere Elements
Simpler version of Adobe Premiere video editing suite
AV Video Karaoke Maker
Create your own Karaoke masterpieces