From: http://www.vmix.com/

Also Video: https://blog.vmix.com/vmix-celebrates-12-months-of-ndi-support/

PRODUCE, STREAM, RECORD
Create professional live productions in HD, SD and even 4K!
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. vMix also functions as live streaming software that allows you to publish your live productions directly to the Internet!

vMix runs on Windows 7, Windows 8 and Windows 10 platforms.