When using bandwidth intensive applications like FTP/bittorrent/newsgroups these will often use all available bandwidth and consequently things like web browsing/video streaming/skype calls will become stuttery/unresponsive.
I would like to allow the bandwidth intensive apps to be deemed lower priority, and only to use as much bandwidth as is not currently being used by higher priority applications.
I don't want to have to manually pause a download when I start watching iplayer for example.
Is there some way that I can do this? Currently most of my bandwidth intensive stuff happens on one machine and the video streaming happens on another, but both machines are used for browsing, so I would like a solution which works by giving priority not traffic on the same machine as well as traffic from different machines.