Findings:
- Media Tracker
- BitTorrent tracker
- Node Tracker (superdoc)
- schism tracker
- Tracker (user)
- Java Node Tracker
- Media Tracker (user)
- Impulse Tracker Effect List
- ModPlug
- E2 node tracker
- United Trackers
- Buzz Tracker
- Scream Tracker
- Impulse Tracker
- tracker
If you Log in you could create a "Modplug Tracker" node. If you don't already have an account, you can register here.