Tags are keywords attached to web pages or websites. Initially they were always displayed as simple alphabetical lists, but now there are other options.
One is Wordle,which generates 'word clouds' from text you provide. Words that appear more frequently are given more prominence. You can tweak the clouds with different fonts, layouts and colour schemes. The images you create are yours to use however you like.
Another is Tagxedo, which does the same thing and has a great variety of options.
