Livepush - Professional Live media streaming & scheduling platform, that supports broadcasting Live media to Facebook, Youtube & 45 platforms at once
OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
datarhei Restreamer - A really nice and free alternative for handling live streams.
Contentflow - Live Streaming Software
StreamYard - StreamYard is a live streaming studio in your browser.
Lightstream - Powerful, cloud-based live streaming studio.