Music on Vine - Vine, now with music. Make 6-second music videos.
EarTrumpet - Volume Control for Windows
Triller - Make celebrity-quality videos with a few taps of your phone
Volume2 - Volume2 is an advanced Windows audio mixer, a complete replacement for the standard Volume Control.
Storybeat - Storybeat app comes up with features to help you in changing the background music of your videos in a few simple steps to share your favorite moments with your social media friends.
Sound Control - App-specific volume control