Scrollume 1.0.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free software for Mac OS X was originally designed by TofuBytes. We recommend checking the downloaded files with any free antivirus. The application relates to System Tools.
From the developer:
Scrollume lets you change the system sound volume simply by scrolling with your mouse or touchpad at the top of screen. The application installs in the menu bar of your Mac so you can enable the program with ease whenever the situation requires it. A notification window pops up when changing the system sound volume.
You may want to check out more Mac applications, such as AlphaTrack Manager, Localghost or Screem, which might be related to Scrollume.