These are all free and open-source, and can be set to 41-equal.
Microtonal-Tuner by Wilckerson Ganda is a browser-based app that works on Windows, OSX, Linux, Android and iOS.
Tuner (from Google Play or Fdroid) by Michael Moessner is an Android app. Note that multiple Android apps have that name.
EDO tuner by John Watson is an iOS app.
EDO-strobeTuner by Kite Giedraitis functions as a DAW plug-in, and requires Reaper (small-footprint DAW for Windows, OSX or Linux) or ReaJS (Windows-only VST wrapper).
LINGOT is a GNU/Linux tuner which supports any tuning system and imports scala files. To set it to 41-equal, download and import this 41-edo.scl file. Then, set the frequency of pitch "1" to D by replacing the "mid-C" text with the frequency number "587.33".
Guitarix is a GNU/Linux guitar-effects app which has 41-equal as a built-in tuning option.
Browser-based Virtual Fretboard Simulators
Touchscreen/mouse: Guitar-Webplayer by Wilckerson Ganda
QWERTY keyboard: Scale Workshop by Sevish
Xenwiki pages (main article here)
Fretboard Charts (downmajor tuning)
Chord Shapes (downmajor tuning)
Scale Shapes - Fretboard charts for the downmajor tuning
Relative and Absolute Tab - Finding your way around the fretboard
Tunings - Isomorphic tunings vs. open tunings
Tuning Instructions - See also software tuners above
Kite Guitar Exercises and Techniques - Various exercises and techniques by various teachers
Translating Songs to 41-equal - Conventional 12-equal pieces, recent microtonal pieces, barbershop tags and World music.
Kite Guitar originals - By various composers
- General Design Considerations
- Fret and Marker Placement
- String Gauges
- Saddle and Nut Compensation
- String Spacing
- Cents Table and Hertz Table
A theoretical exploration of 41edo scales. The 5 categories are pentatonic, diatonic, semitonal, trientonal/fretwise and microtonal.
41-equal Note Names and Key Signatures
How to name any note in any chord on any root in any key, using ups and downs.
How to name various triads and tetrads, even those not easily playable on the Kite guitar such as C~7.
Avoid large numbers and tedious mental calculations by counting kites, dots and frets.
The Kite Tuning (original announcement)
The May 2019 paper, the original announcement of the invention (16 page pdf).