I have been playing around with SCSS recently and as a result have added a bunch of mixins and functions that I'm sure I will use again in the near future.
The below mixins/functions are available here...
- _box-shadow.scss
- _link_button_colours.scss
- _nth-of-type.scss
- _pixel-to-ems.scss
- _pixel-to-percent.scss
- _vendor-prefix.scss