Learn How to Play Uke Chords
ukulelechords.fm is a free ukulele chord finder with thousands of chords for soprano and concert ukulele (tuned GCEA). These chord voicings will also work with a banjo ukulele (aka banjolele) or any other instrument with the same tuning. There is also a small number of baritone ukulele chords. Free printable PDF downloads are available for every chord.
A ukulele chord chart is also available with chord diagrams for common chords in every key.