Open-source OBS Studio can record and transmit live. It's free and customizable, making it ideal for expert users.
It offers the same functionality as OBS Studio and many others that are harder to locate. Streamlabs OBS includes alarms, customizable overlays, text-to-speech, and widgets like a viewer counter and chat area.
Flutin lets you multistream your real-time and pre-recorded video live streams to Instagram, YouTube, Facebook, LinkedIn, and 20+ more.
Live streaming using OneStream and other streaming solutions allows multicasting. You could use Zoom, Wirecast, or OBS to stream straight to OneStream.
XSplit Broadcaster records and streams. It's designed for game streamers.