• tools for maths accents;
• a tool that changes page-numbering in frontmatter to arabic;
• tools for dealing with some annoyances in babel;
• a tool for making end-environment checking more meaningful; tensorial indexes;
• support for multi-file documents;
• tools for easy entry of Spanish index entries; dotless i's and j's for maths fonts; and
• fancy underlining.

The author is Javier Bezos.