It's the Celtic Text Generator at the Celtic Cross Stitch site.
This quick and easy to use tool automatically generates any text you type into lovely and fancy looking celtic lettering. Be aware that you can only use one line of type and that there are no special characters. The word you type is the word that is generated, and it is case-sensitive, meaning that will not get capital letters unless you type them as capitals.
Also, the letters that are generated are large, and so only short words or phrases are best, unless you intend on working a very big piece. This lovely alphabet would work well for first names, or for a gaelic word that has personal meaning to you. It would combine with celtic knotwork patterns beautifully. To save, left click on the generated text with your mouse and select Save Picture As from the pop-up menu.
When you visit, you might want to enter the monthly competition to win a free chart!