What are some alternatives?
When comparing GetHarmony.net and Instrument Bible, you can also consider the following products
yalp.io - Automatic chords extraction from mp3 and YouTube
MuseScore - 24 Sep 2012 . Design a homepage that captures attention and serves as a good starting point for navigating the website.
Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
GUITAA - Turn ANY song into chords, play along with interactive chords and diagram, transpose, loop, tempo control.
LilyPond - GNU LilyPond is a computer program for music engraving.