Although there are others on your list that could possibly fill the BS file, the Buzzy Tuning System is the most relevant to this forum.
No actual personal experience with it, but it seems to address a problem that I don't have, at least on any guitars that I care about when tuned using Peterson's Strobosoft. Or, tuned using my old, ringing ears.
Yup, a resident of the BS file.
Bone (and ivory) picks have been BS svery since I first tried them.