From Designm.ag:
Font selection for headlines on websites can be critical to achieving the right look and drawing the proper attention with the headlines. Here is a look at more than 50 fonts that will give you some options for creating strong headlines that communicate a message. Some of these fonts you probably already have, some of them can be downloaded for free, and others can be purchased. Each font is linked to a page where it can be downloaded or purchased.
See the List
Related Reading:
Swash Letter Alphabets: 100 Complete Fonts (Dover Pictorial Archives)
Graffiti Alphabets: Street Fonts from Around the World (Street Graphics / Street Art)
Just My Type: A Book About Fonts