ChordMate for Mac, available from the Mac App Store for US$51.99, is a guitar chord library that makes learning, identifying and building custom chords to play on the guitar easy.
If you already play guitar, ChordMate will encourage you to learn and play new and different chord voicings and inversions on the guitar that you might not normally play.
In essence, ChordMate is a vast and complete digital chord book for your Mac.
I spent a bit of time with ChordMate, and discovered some real advantages to investing in it, particularly if you're learning guitar, teaching guitar, or looking to increase the variety of your chord repertoire. Or even make a chord sheet for a song.
Say you're learning the guitar and there's a chord from a song you want to play. Let's say this chord is C. With ChordMate, simply enter "C" into the search box and a variety of different ways to play a C chord will appear in tablature form, specifically showing you where to place your fingers on the guitar neck and which notes you will be playing.
Because there are so many different ways to play C, with so many different voicings, ChordMate has a filter system to help narrow down what you're looking for depending on whether the chord is open, barred or a root position, etc.
This can be a bit complicated for beginners, but the filters go even further to break down the results. There's 'quality' (for the purest voicing), 'ease of play' (for the easiest voicing) and 'fret' (depending on where you want to play the chord on the neck).