VideoScribe - Make your own whiteboard video animations with Sparkol VideoScribe – award-winning video scribing app for PC, Mac and iPad. Free trial available.
Sound Control - App-specific volume control
Wochit - Wochit is a cloud-based video creation platform that creates studio-quality videos with premium licensed content, fast.
Volume2 - Volume2 is an advanced Windows audio mixer, a complete replacement for the standard Volume Control.
Doodly - Create your own doodle video in just 60 seconds
EarTrumpet - Volume Control for Windows