The Cascading Style Sheets (CSS) Working Group invites implementation of the Candidate Recommendation of CSS Counter Styles Level 3. It adds new built-in counter styles to those defined in CSS 2.1, but, more importantly, it also allows authors to define custom styles for list markers, numbered headings and other types of generated content. This Candidate Recommendation incorporates responses to all feedback received during the previous two Last Calls.
The Internationalization Working Group has also updated their Working Draft of Predefined Counter Styles, which provides custom rules for over a hundred counter styles in use around the world. It serves both as a ready-to-use set of styles to copy into your own style sheets, and also as a set of worked examples.