http://delta.affinix.com/qca/

http://delta.affinix.com/download/qca/2.0/qca-2.0.2.tar.bz2

additional plugins:

http://delta.affinix.com/download/qca/2.0/plugins/qca-ossl-2.0.0-beta3.tar.bz2

http://delta.affinix.com/download/qca/2.0/plugins/qca-gnupg-2.0.0-beta3.tar.bz2

Required: qt4

./configure --prefix=/usr &&
make

make install

For the plugins:

./configure &&
make

make install