+++ Chordious +++ helps you find the chords and scales for any fretted string instrument while also givings you powerful customization options.

Chordious should work anywhere .NET 4.5 is supported (Windows Vista SP2 / 7 SP1 / 8 / 8.1 / 10). Make sure you have .NET 4.5 installed.

Just tried it and it only shows diagrams for a 4 string banjo. It does not show the 5th string on a bluegrass banjo at all.