Taken from the KDE Corporate Identity Guidelines on wiki.kde.org.
"Typeface
The KDE project uses a typeface called "Bitstream Vera Sans Bold" for all printed and screen material.
As the Bitstream Vera family only provides support for the standard
TrueType character set (Latin1). To provide support for additional
languages the font has been extended by third parties. As the Bitstream
Vera font license doesn't allow modifications of the font using the
original font name the extended versions are available under new names:
Hunky Fonts (0.3): additional letters for Baltic, Central European,
South European and other languages, including Maori, Welsh and
Esperanto.
SUSE/Novell offers "SUSE Sans" which is supposed to cover support for all Latin languages:
If Bitstream Vera Sans is not or might not be available then "Verdana" should be used (e.g. for Website styles).

Headlines are in black or they are in white on blue or black
backgrounds. Sublines and lead-ins can be in black on white
backgrounds. Copy is always black
KDE Logo Font and KDE-EDU
In general the Kabel-Font may only be used uppercase. It may only be
used for the term "KDE" itself and related to topics like KDE-EDU, kids
and games.
A free look-alike called "Kabel Book" by A. Carr is available.
In addition many Font Companies offer a Kabel font family commercially.
(2) Kabel is a trademark of Heidelberger Druckmaschinen AG, which may
be registered in certain jurisdictions, exclusively licensed through
Linotype Library GmbH, a wholly owned subsidiary of Heidelberger
Druckmaschinen AG.
(3) Gnome Foundation and Bitstream Inc. announce long-term agreement to bring high quality fonts to free software:
http://www.gnome.org/press/releases/bitstreamfonts.html
Font for aKademy
Silicon, Copyright 1991, Atech Software, Carlsbad CA


