Hear - Hear is a sound enhancement application for the Mac.
EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
Krisp - Eliminate background noise, minimize distractions, feel more confident, and activate your communication superpower with Krisp, an AI-powered software solution for effective online meetings.
Meludia - Listening exercises and to sharpen your ear and music theory skills
TimeBolt - spend less time editing video
LenMus - LenMus is a free program for learning music.