Nimble Streamer!

MistServer is a lightweight, open-source multistandard multimedia server. It bridges the gap between lightweight webservers and the usually heavyweight mediaservers that support non-HTTP protocols.

YouPHPTube! is an video-sharing website.

Unreal Media Server is a software streaming server offering rich choice of live and on demand streaming functionality. It streams with variety of streaming protocols to deliver content to Flash Player, Silverlight, Windows Media Player, Unreal Media Player, mobile devices and Set-Top boxes.

Red5 is an open source Flash media server for live streaming solutions of all kinds.It is written in Java that supports

Streaming media server supporting all known streaming protocols.

Kurento Media Server provides, out of the box, group communications, mixing, transcoding, recording and playing. In addition, it also provides advanced modules for media processing including computer vision, augmented reality, alpha blending and much more.

The Adobe® Flash® Media Server family of products has become the industry-leading solution for streaming video and real-time communication. The ubiquity of the Adobe Flash Platform provides a rich viewing experience across virtually all operating systems and screens through integration with the Adobe Flash Player runtime, adopted on 98% of computer screens worldwide.

Smooth Streaming, an IIS Media Services extension, enables adaptive streaming of media to Silverlight and other clients over HTTP. Smooth Streaming provides a high-quality viewing experience that scales massively on content distribution networks, making true HD 1080p media experiences a reality.

Flussonic is a great scalable Media Server that is a cost effective alternative to Wowza Media Server and Adobe Flash Media Server . It was specifically designed to stream HDS/HLS/HTTP.

Simple and efficient multicast and transport stream manipulationThe multicat package contains a set of tools designed to easily and efficiently manipulate multicast streams in general, and MPEG-2 Transport Streams (ISO/IEC 13818-1) in particular.The multicat suite of applications is very lightweight and designed to operate in tight environments. Memory and CPU usages are kept to a minimum, and they feature only one thread of execution. It is designed to run on Linux, FreeBSD and Mac OS X.