MirrorFly - World's Most Scalable Voice, Video & Chat SDK for Small, Medium & Enterprises
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
echofin - Echofin helps communities grow, engage and monetize their following in ways no other platform has done so far.
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.
chatwee - Group chat app for online communities. Used wherever visitor interaction and engagement are key to the site's functioning.
Finale - Finale, the world standard for music notation software, lets you compose, arrange, notate, and print engraver-quality sheet music.