• support for short commands starting with @,
• macros to sanitise the OT1 encoding of the cmtt fonts;
• a ‘do after’ command;
• improved footnote support;
• mathenv for various alignment in maths;
• list handling;
• mdwmath which adds some minor changes to LaTeX maths;
• a rewrite of LaTeX's tabular and array environments;
• verbatim handling; and
• syntax diagrams.

The author is Mark Wooding.