A Newton device with Newton OS 2.0 or greater. (That means a MessagePad 120 (one with OS 2.0), 130, 2000, 2100 or eMate 300. It's been tested on a MessagePad 2000 only. There shouldn't be any problems with any others, though.)
About 12K free on a store.
ChordBox is a simple application to show guitar chords and how to fret them.
Use the Newton Connection Utilities program or other package-installation utility that came with your Newton device to download the included package.
There are two pickers at the bottom of the app. The one on the left is for the selection of the root note. Use it to select the root of the chord you want to look up. The one on the right is for the selection of the chord desired. Select the chord you wand to look up. Then, above the pickers, you'll see the chord. The dots indicate which strings need to be fretted, and the dotted strings are not to be played.
Version 1.0 (25 November 1999)
Initial release
The application ChordBox is Open Source. Please feel free to give a copy to anyone you wish. Its use is covered by the following (BSD-style) license:
Copyright © 1999, Avi Drissman
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AVI DRISSMAN OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Enjoy.