It seems cool, but what are the use-cases for a standalone previewer? I mean, it's essentially the same as just having both the Sass source file and the compiled file open with an auto-compiler ( / preprocessor) on - which you would need in order to use Sass anyway. Anyone care to explain it to me? :)
Edit: I do love the icon, though!
@ennsu maybe some people haven't figured out how to have an autocompiler running at the same time? I agree, it seems pretty straightforward, like there doesn't really need to be an app for this...