[toastal]

If you need something much less complex than Sass, but has a similar syntax to Sass (not SCSS), PostCSS + SugarSS has been nice for me. I really prefer indented syntax, and ever since CSS variables became readily available on my project support requirements, there's not been much reason to reach for Sass. A lot of people seem to point to the color functions, but I don't think a lot of people noticed Sass and Less don't do color mixing/darkening properly (they don't square the gamma before doing operations) so I wouldn't advise using these built-ins anyhow.