Mammoth Server!

MediaGoblin is a free software media publishing platform that anyone can run. You can think of it as a decentralized alternative to Flickr, YouTube, SoundCloud, etc.

YouPHPTube! is an video-sharing website.

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

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.

Flumotion is a leader in online video and audio technology. The multiple award-winning services include an Online Video Platform and Online Radio Platform that maximize content monetization and return on investment. The Software as a Service solution covers the entire value chain and transforms a single video or audio stream into value added content. It adapts live and on demand videos to all devices, allowing companies of any size to reach 100% of their audience. Clients and partners include Nestlé, L'Oréal, Orange, ACB, FIBA, Danone, Telefonica and NTT. »

Streaming media server supporting all known streaming protocols.

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.