I use MagicScore Maestro, it is quite affordable and is a really multifunctional tool. It supports many instruments, has virtual tools for piano and guitar, u can tune sounds and create a goos stuff without being a profi, one should just have an ear for music:)
I am looking for a really simple notation software (MIDI) where if I hit the keys on my keyboard/digital piano, I can see the notation on the computer screen. Without recording, without a metronome, just the note or the chord - to disappear as soon as I let up. For learning to recognize the chords.
Another variation would be to have a score with black notes, and have them light up red when you hit them.
Does anybody know of any software like this?