Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Brain Games - Boost memory power with free brain games
JJazzLab - Fed up with boring backing tracks ? Try JJazzLab!
Dualnback.works - Dual N-back is a specific brain training exercise, that's been shown by research - it might improve fluid intelligence.
Guitar Pro 7 - Create, play and share your tabs
Pixelogic - Daily Picross - Nonogram logic game with 5000+ puzzles and a daily puzzle