StreamDesk is an application for Windows that allows you to watch Ustream.tv, Justin.tv, or any other online streaming service that provides video embeds on your desktop.
Open Source Ustream Alternatives
The best open source alternative to Ustream is Streamdesk. If that doesn't work for you, our users have ranked more than 25 alternatives to Ustream, but unfortunately only one of them is open source. If you can't find an alternative you can try to remove all filters.