re:AMP - Audio player for Mac with Winamp classic skins support

Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.

Audioread (formerly Audiblogs) - Audiblogs lets you listen to any web article in your podcast player in an Audible-like voice.

MuseScore.org - Create, play back and print beautiful sheet music with free and easy to use music notation software MuseScore. For Windows, Mac and Linux.

Overcast - Video-first asset management for teams

Finale - Finale, the world standard for music notation software, lets you compose, arrange, notate, and print engraver-quality sheet music.