Swatches - A fun and accurate color picker for the real world
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.
ColorSnapper - The missing color picker for Mac.
Guitar Pro 7 - Create, play and share your tabs
Sketch Palettes - Sketch plugin to save and load colors into the color picker
Finale - Finale, the world standard for music notation software, lets you compose, arrange, notate, and print engraver-quality sheet music.