Thomas F. Sturm
Simple CSV file processing
Fixed-point arithmetic with two decimal places
Pedigree and genealogical tree diagrams
Sophisticated graphics inclusion in a PDF document
Spherical Mercator coordinate systems and Web Mercator tile integration
Sanitize umlauts for MakeIndex and pdfLaTeX
Coloured boxes, for LaTeX examples and theorems, etc
TikZ libraries for filling with images and patterns