TRAX - Trax is a free web-based tool for planning your model railroad
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Virtuoso - Virtuoso app enables you to practice and keep a record of your learning activities to build custom lessons.
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.
TrainCad - Freeware Microsoft Windows program for designing model railroad layouts using standard tracks.
Finale - Finale, the world standard for music notation software, lets you compose, arrange, notate, and print engraver-quality sheet music.