The 1.0 version of NoteCoach for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this software for Mac is rinik. We recommend checking the downloaded files with any free antivirus. The program belongs to Audio & Video Tools.
From the developer:
NoteCoach is a simple application that will teach you to read sheet music. All you need to do is connect your MIDI keyboard or just use the on-screen piano, and start learning. Practicing every day, you will become soon a proficient sheet music reader.