PRIMUS INTER PARES
Our suggestions
A flexible, optimized and free image format
History, advantages and usage contexts of the PNG image format.
Columns filled with numbers turned into images
ECMAScript (Javascript) library, distributed under the GPL license, that creates charts from (x)HTML tables.
To what country, but mostly what continent, corresponds each of the top-level domains?
Reference charts, divided by continent, for domain name suffixes.