Listening Ear Trainer - Listening Ear Trainer has 2 methods to improve your pitch recognition skills. The Singing Funnel Method lets you sing notes with increasing precision. The Octave Anchor Pitches Method builds a repertoire of notes, which increases with each exercise.

Meludia - Listening exercises and to sharpen your ear and music theory skills

Pitch Ability Test - Test your Pitch Ability. Measure your pitch take over and pitch retention abilities. Know where you stand on the road to Absolute Pitch. Especially, measure the criteria: Accurately sing a named note without a reference.

GNU Solfege - GNU Solfege is free music education software.

Perfect Ear - A simple yet advanced application for improving your solfege skills.

LenMus - LenMus is a free program for learning music.