🚀 go-pugleaf

I was wondering if anyone knows of any software
(hopefully public domain) which will show chords, and
their inversions?

For example, I'd like to enter something like Cmaj7, and it would
show me the appropriate key placement on the piano, and
hopefully all the inversions.

I've seen little chord 'calculators' that do this, but at
$50, they seem a little expensive.

I can enter chords in band-in-a-box, but it has to calculate
the bass parts, etc., so it takes a while to see what I need.

At worst case, does anyone publish a pocket-size chord chart?  
I've seen ads in keyboard for the wall-size poster, but that a
little tough to carry around!


Thanks

Eddie Mikell