Video Puppet - Edit video as easily as editing text!
Invision - Prototyping and collaboration for design teams
Quik by GoPro - Easiest way to create awesome videos
Proto.io - Create fully-interactive high-fidelity prototypes in minutes that look and work exactly like your app should. Sign up for a free 15-day trial and get started.
Write-on Video - The Video Editor for Storytellers. Create Storyboards, Edit Video, and Make an Impact.
Balsamiq - Balsamiq. Rapid, effective and fun wireframing software.