• Command Line
• Task runners like Gulp/Grunt/Brocolli
• webpack
• CodeKit
• CodePen
• VS Code Extension? https://github.com/wojciechsura/easysass

File watching....

• Gulp.watch
• Guard?

What if you also need style injection after processing?

• LiveReload
• HMR

Old?

• less.app
• compass.app
• http://fireapp.handlino.com/
• http://get-serve.com/