Pitch Program/App?
 

I'm looking for a good, free pitch program or app that plays a note then prompts me to guess which note it is, which preferably randomizes and has the option to play multiple notes at once.

Does anyone have a good recommendation?

Close your eyes and press a random key on the piano.

Or get a piano app and press a random key on that.

I like wiggum's proposals. But there is software too. WinOye is free and offers different excercises for notes, chords, melodies and more.

I searched up "Note Tester" on Google, come on man.