Transposer
Transposer changes chords from one key to another in a song file.
... otherwise be transposed.
There are two editing panes in the main window. One is for the original song, and the other is for the transposed song.
Earlier versions of this program were command line only (CLI), then I used QT to augment my C++ source to create a GUI.
This project is now developed in Lazarus, using a collaborative approach. I (abudeveloper) and my son (iamslinger) are working together on this project.