avtake CutFour is described as 'PROFESSIONAL REAL TIME HD LIVE VIDEO MIXING SOFTWARE » Up to four live video input support + inputs for title overlay, video player, Image source and screen capture » Video input interface supports Black Magic Design PCI-E capture cards (Decklink series and Intencity' and is an app in the Photos & Graphics category. There are more than 10 alternatives to avtake CutFour for Windows, Mac and Linux. The best alternative is Vidiot, which is both free and Open Source. Other great apps like avtake CutFour are ArKaos GrandVJ (Paid), Resolume Avenue (Paid), Modul8 (Paid) and LiVES (Free, Open Source).
LiVES is a Video Editing System. It is designed to be simple to use, yet powerful. It is small in size, yet it has many advanced features. LiVES mixes realtime video performance and non-linear editing in one application.
3D R2R music visualizer and music video creator software. Make a VJ show like a PRO. Create a unique tight symbiosis of sound and video for your party or YouTube. Fully automated with high end 3D real time scenarios, videos and pictures in Full HD.
vMix is a Software Video Mixer and Switcher that utilises the latest advances in computer hardware to provide live HD video mixing, a task previously only possible on expensive dedicated hardware mixers.