Here are two great websites for building and finding (even more complex) chords:
Build any chord:
You know the name of the chord (e.g. Piano above), you just don't know how to put it together.
Go to this website and it will help you visualize the chord:
Identify any chord:
You have a chord, you see all the notes, but you don't know how it is called.
This website has a nice "Chord ID" function:
Find your scale
PML Course about harmony and chord progressions:
Keywords: How to find, name and build chords