GitHub Repository Size - Browser extension to show file and repo size in GitHub

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

Charte - Free online interactive charts for non-techies

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.

Charts Factory - Create simple charts super fast and for free!

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