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fcbanner is a variant on the banner program that uses fontconfig and freetype to draw its characters. Thus, it can easily draw using various fonts -- any font you can get in Gnome or Mozilla for example -- and handles non-ASCII characters if they are present in the font.

You can download the source code fcbanner.c here. Build instructions and usage examples are in a comment in the source code.

fcbanner is released under the terms of a BSD-style licence.