Music on Vine - Vine, now with music. Make 6-second music videos.
Mindie - 10 second music videos (w/ private mindies)
Lomotif - Instantly create and share awesome music videos
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.
Typito - Web based drag-and-drop tool to create engaging videos with beautiful typography, images and brand layouts.
Owlead - Grow your Twitter with valuable followers, effortless