Freetattoodesigns.org has categorized galleries of tattoo photos and original designs. About.com has a tattoo and body piercing website that includes a page containing pictures of tattoos in categorized galleries. Tattoojohnny.com has some free sample design downloads, but other designs on the site require payment.
Taking several pictures of designs obtained from free online galleries to a tattoo artist allows the artist to create a custom tattoo, incorporating your style and personal taste into the design. Custom design is sometimes included in the cost of a tattoo session. In addition, free non-custom designs are available at most tattoo parlors in portfolios. The artists are familiar with these designs and have set prices for them.