There was per-application volume control applet for Gnome 2. There is a per-app volume control extension for Gnome-Shell.

Is there any indicator applet for Unity like this two?

  • 1
    From the sound settings > application tab you can control volume per-app basis. Is that what you want?
    – Samik
    Jun 18, 2012 at 15:18
  • I don't know any applet for Unity but you can do this via pavucontrol, which is a separate application!
    – FSMaxB
    Sep 26, 2013 at 10:13
  • This unanswered question is 5+ years old and OP hasn't signed on in 5+ years to respond to comments. The Ubuntu version at the time is now EOL and OP has abandoned the question. VTC as not reproducible. Jul 23, 2017 at 19:52