The Jelloween Font Foundry is a one (wo)man project, started in 2006 by Tjarda Koster. She currently lives in the Netherlands and has been making fonts since late 2005.

Some of her earliest designs - mostly pixelfonts - are viewable (and freely downloadable) from the Jelloween website.

When not making fonts, Tjarda spends her time studying, drawing and messing around with all sorts of digital art.