The ChordPro standard and reference implementation are free products. Free as in speech. Development is done by motivated volunteers. They all do it for free.
However, web sites, storage and bandwidth cost actual money. If you like ChordPro, please consider a small donation.
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Official web site: https://www.chordpro.org/.
Help improving this documentation - visit https://github.com/ChordPro/chordpro/wiki
