Red5
Open-source Java-based media server supporting RTMP streaming, recording, and live publishing — over 1 million installs since 2005.
MediaFree
About
Red5 is an open-source Java-based media server supporting RTMP streaming, recording, and live publishing. One of the oldest streaming servers (since 2005) with over 1 million installs. Red5 Pro is the commercial variant with WebRTC and clustering.