See also Metaflop Modulator: https://www.metaflop.com/modulator https://www.metaflop.com/modulator (It has four variable fonts, each with a lot more parameters

See also Metaflop Modulator: https://www.metaflop.com/modulator https://www.metaflop.com/modulator (It has four variable fonts, each with a lot more parameters than here.) Creating a variable font is a lot of work, which is probably why Knuth's METAFONT never took off, but it can be a lot of fun.