HAML and LESS. But Sass has plugin support and a lot of plugins like FancyButtons. I use less coz it's minimalistic. I use Balsamiq for mockups and heard abou

HAML and LESS. But Sass has plugin support and a lot of plugins like FancyButtons. I use less coz it's minimalistic. I use Balsamiq for mockups and heard about lxEdit recently.