Guitar Pro 7 - Create, play and share your tabs
Niko Niko - Employee Engagement
TuxGuitar - A Multitrack tablature editor and player.
Track and Assess - A private, record keeping tool that helps you store your thoughts and observations on a daily basis.
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.
Year in Pixels - Keep track of your mood during all year using pixels.