Company:
Github

Preprocessor:
SCSS

Prefixing:
Custom @mixins

# Source files:
100+

# Selectors:
7,000

Style enforcement:
SCSS-lint, styleguide

Notes:
2 final stylesheets, because of IE selector limit

 

Company:
Buffer

Preprocessor:
LESS

Prefixing:
Autoprefixer

# Source files:
93

# Selectors:
5328

Style enforcement:
LESS lint

Notes:
2 final stylesheets

 

Company:
CodePen

Preprocessor:
SCSS

Prefixing:
Autoprefixer

# Source files:
171

# Selectors:
1186

Style enforcement:
.editorconfig

Notes:
Asset pipeline

 

Company:
Ghost

Preprocessor:
SCSS (libsass)

Prefixing:
Autoprefixer

# Source files:
36

# Selectors:
1609

Style enforcement:
General guidelines

Notes:
Open source

 

Company:
Groupon

Preprocessor:
Sass (syntax unclear)

Prefixing:
Compass

# Source files:
?

# Selectors:
?

Style enforcement:
SMACSS

Notes:
Toolstrap

 

Company:
Lonely Planet

Preprocessor:
Sass

Prefixing:
Autoprefixer

# Source files:
150+

# Selectors:
1527

Style enforcement:
Rizzo, no linting

Notes:
BEM / OOCSS, Normalize.css, SVG icons

 

Company:
Medium

Preprocessor:
LESS

Prefixing:
Custom @mixins

# Source files:
?

# Selectors:
?

Style enforcement:
Guidelines

Notes:
No nesting, custom methodology for naming

 

Company:
Trello

Preprocessor:
LESS

Prefixing:
Custom @mixins

# Source files:
44

# Selectors:
2,426

Style enforcement:
Preprocessor

Notes:
1 final stylesheet, namespacing