The Sifflet visual functional programming language and aid to understanding recursive functions (http://mypage.iu.edu/~gdweber/software/sifflet/home.html)

#19Closing all program windows leaves executable still running but no way to kill it

19 Closing all program windows leaves executable still running but no way to kill it (Ctrl+C is a no-op).*

O: 2010 nov 3 R: Andrew Coppin P: HIGH C: 2010 dec 9 (actually fixed dec 3): closing the workspace window now "safely" quits from the application.