Here is small list of other "classless" CSS libraries I have found over the years

- https://github.com/andybrewer/mvp

- https://github.com/kognise/water.css

- https://github.com/xz/new.css

- https://github.com/vladocar/Basic.css

- https://github.com/oxalorg/sakura

- https://github.com/igoradamenko/awsm.css

- https://github.com/hawkz/gdcss

- https://github.com/emareg/classlesscss

- https://github.com/vincentdoerig/latex-css (disclaimer: I am the author)