Nice! I always forget the lsof flags and end up googling them every time. Would be cool if it could run in the system tray and show what's running on your ports at a glance. Also, the name had me thinking SonarQube at first, might be worth considering a rename to avoid the confusion.
Someone else added an issue about this, and i replied explaining how to run the feature branch, have a look and please add any ideas to the issue:
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