Our website provided a free download of MacAutoMute 1.0 for Mac. This free software for Mac OS X is a product of Smartec. MacAutoMute for Mac belongs to System Tools.
From the developer:
MacAutoMute is a simple Preference Pane that auto-mutes your Mac when the screensaver goes on. Therefore, the program mutes all your system sounds after a few minutes (this time depends on how you set the screensaver). Consequently, no notification sound will wake you up in the middle of the night just because you forgot to press the mute button.
You may want to check out more Mac applications, such as ToFi, iStar Composer or Portable Nvu, which might be related to MacAutoMute.