Unfortunately, I don't have access to VS2012 anymore so I can't really contribute any improvements unless I can find a maintainer.
SassyStudio provides a small amount of integration with Visual Studio to the experience using Sass / SCSS a bit friendlier. Here's what we provide so far:
- Syntax Highlighting
- Outlining
- Generate css file on save
- Multiline Comments
- Intellisense completion support for variables, functions, mixins, and keywords
- Intellisense completion support for CSS syntax
In the near future I am planning to add support for the following (assuming VS/Web team doesn't add it first):
- Error integration
You can grab the extension from the Visual Studio Gallery
If you are curious about what's coming next you can take a look at the road map for the project.