If you Google "Ukulele Chord Chart", you'll get a ton of hits. But they all pretty much show the basics. Majors, minors, 7ths, 6ths, maybe diminished, augmented, and 9ths. That's often pretty much it.
To go beyond that, you could find one of those online automatic chord program thingies. Or you could buy a more complete chord chart, like Mel Bay's ukulele chord book.
But you know what I recommend instead? I say you just sit down and learn about chords: How they're constructed, why they get the name they do, what a slash chord is, what a sus4 is, and that sort of thing. There's actually logic behind it all, and once you know the formulas, you can figure out any chord there is, without a chart, book, or program.
JJ
