Found a cool website. Just putting a link here.
Enter a series of notes ( the notes of a scale ), it computes many possible chords from those notes.
http://scottdavies.net/chords_and_scales/music.html
It has a few innacuracies when entering scale notes as they appear in cycle of fifths.
For example, it had some trouble with the E# and B# in C# Major scale ( C# D# E# F# G# A# B# ).
It wants F instead of E#, it wants C instead of B#.
Also doesn’t provide all the inversions