Luthiers rejoice—Songbird is a parametric multiscale fretboard generator for Rhino.
You can use it to generate fanned fretboards for guitars, mandolins, bass guitars, ukuleles, or whatever instrument you want to cook up. It also generates standard single scale, non-fanned fretboards just as easily. Simply input the same scale length for both first and last string. The plug-in exposes a single command called fretboard.
Songbird is free. Download it on food4Rhino!