Skeleton: A Dead Simple, Responsive Boilerplate for Mobile-Friendly Development

Functional css for humans

A spinning activity indicator

Highly customizable checkboxes and radio buttons (jQuery & Zepto)

StyleStats is a library to collect CSS statistics.

Simple CSS3 framework for creating GitHub-style buttons

CSS3 syntax (and syntax defined in some foreign specifications) support for Vim's built-in syntax/css.vim

A jQuery plugin for floating form labels

Syntax highlighting color themes for Google Code Prettify

SCSS version of normalize.css

A new placeholder UI design for Bootstrap forms

Nice theme for Trulia's Hologram styleguide generator

Qiitaに投稿した「Noto Sans CJK JP フォントをダウンロードしてサイトに適用する手順」のサンプルデータ

Stylesheets for terkel.jp