Esger Renkema
The contributor Esger Renkema appears to be present as the CTAN community member renkema.
METAPOST support for the Hershey font file format
A modern plain format for the LuaTeX engine
Create tiling patterns with the minim-mp METAPOST processor
Extensive maths for LuaTeX
Low-level mplib integration for LuaTeX
Low-level PDF integration for LuaTeX
Embed XMP metadata in PDF with LuaTeX