  We report extensive studies on the CeCo$_{1-x}$Fe$_{x}$Ge$_3$ alloys, which
show quantum critical point (QCP) due to damping the antiferromagnetic order in
CeCoGe$_3$ down to 0 K by doping with the paramagnetic CeFeGe$_3$ compound. The
presence of QCP is confirmed by detecting the non-Fermi liquid behavior (NFL)
using a wide range of the experimental methods: magnetic susceptibility,
specific heat, electrical resistivity, magnetoresistance, and thermoelectric
power. In the case of the thermoelectric power we find a clear enhancement of
the Seebeck coefficient for $x$ around 0.6, i.e. in the neighborhood of QCP.
Finally, the different complementary studies enabled construction of the
complex magnetic phase diagram for the CeCo$_{1-x}$Fe$_{x}$Ge$_3$ system,
including the energy scale imposed by the crystal electric field splitting of
the Ce ground state.
