This directory includes the fonts packaged with KFormula.

From BaKoMa fonts cmex.ttf is included. Its license is included in
LICENSE.BAKOMA. It's site at CTAN is:
http://www.ctan.org/tex-archive/fonts/cm/ps-type1/bakoma/

Arev fonts are also included. These fonts are derived from Bitstream Vera
fonts and so both Bitstream Vera's license (included in LICENSE.BITSTREAM) and
Arev license (included in LICENSE.AREV) apply. Arev fonts' homepage is:
http://tavmjong.free.fr/FONTS/