Jonathan P. Spratte
The contributor Jonathan P. Spratte appears to be present as the CTAN community member JPspratte.
Place contents into a full width colour strip
Draw ASCII art of animals saying a specified message
Create duckified dummy content
Expandable token list operations
An expandable key=val implementation
An expandable key=val implementation and friends
Define expandable key=val macros using expkv
A key-defining frontend for expkv
Parse class and package options with expkv
Read an argument into a box and execute the code afterwards
Format menu sequences, paths and keystrokes from lists
Define pgfmath functions using xfp
Draw pixel pictures
Cistercian numerals in LaTeX