Metastream - Watch streaming media with friends
TVexe - Watch TV on your PC free
Watch2Gether - Watch2Gether is an app that allows multiple people to watch the same content simultaneously and interact with each other while watching.
TVCatchup - TVCatchup is an Internet television service for viewing free-to-air UK channels.
StreamParty - StreamParty is a watch communiry, that allows you to watch video streams in sync with the people you care about, on multiple services.
Slingbox - Slingbox is a TV Steaming device that encodes local video for transmission over the internet to the remote device.