Wowza Media Server - Really hot!

The Wowza Media Server is a upcoming, commercial alternative to Adobe's Flash Media Server with some unique features such as FastForward and Rewind.

The Wowza Media Server (WMS) is a Java 5 (aka 1.5) server application that can be extended using Java on the server side and Flash on the client side using the Flash Media Server client side ActionScript API. The software supports Live streaming (using ON2 Live), Video on Demand with Fast Forward, rewind and prepend operations, multiuser Video Chats (video, audio and text) as well as Video Recording.

This addition brings more competition to the Flash Video space where Adobe's Flash Media Server and Red5 currently represent the outer limits.

Wowza Pro10: FREE
Perfect for development and personal use, the Wowza Pro10 edition supports a maximum of 10 concurrent connections and does not have MPEG-TS ingest capabilities. Otherwise, the Pro10 edition contains the full features and functionality of the Wowza Pro Unlimited with MPEG-TS edition.

Wowza Pro Unlimited with MPEG-TS: Single License $995
The Wowza Pro Unlimited with MPEG-TS edition has no per-server connection capacity limit and is the best option for commercial deployments. While the Wowza Pro Unlimited with MPEG-TS edition does not limit the number of connections, connection capacity will depend on your choice of hardware, internet connection bandwidth and specific application.