There's this program from makemusic called "Finale Notepad" which is the free version of the famous notation program FINALE and it's a very small simple program...
I wonder if it would be possible to get that as an portable app
(Just for the case that you have an musical idea you want to write down very quick)
Here's the program:
As a musician this would be a great thing to have notation software portable...
Thanks for giving this opportunity here.
With best regards.