A program that can generate AsciiArt text in a number of different styles, as was popularly used in SigFile in from the mid-80s to mid-90s.
An example (WikiWikiWeb):
__ __.__ __ .__ __ __.__ __ .__ __ __ ___.
/ \ / \__| | _|__/ \ / \__| | _|__/ \ / \ ____\_ |__
\ \/\/ / | |/ / \ \/\/ / | |/ / \ \/\/ // __ \| __ \
\ /| | <| |\ /| | <| |\ /\ ___/| \_ \
\__/\ / |__|__|_ \__| \__/\ / |__|__|_ \__| \__/\ / \___ >___ /
\/ \/ \/ \/ \/ \/ \/
The homepage for FIGlet is http://www.figlet.org/.