If someone knows any software with these features:
- Works from the tray area
- Very lightweight
- Works also in Windows XP (preferably workstation, nothing serverish required)
- Can show a bandwidth usage graph, where I can easily see each PC's usage
- I can inspect a computer's connections, find out the ports and applications that are using them (eg, all bandwidth is consumed by PC #3, that's running uTorrent.exe from port 33003)
...I'd happily check it out. I'm only sharing my connection with (at most) four computers - I'd prefer not having to add hardware or reinstall my system.