  For the field theories dual to D3/D7- and D3/D5-brane systems we find
non-relativistic finite density fixed points exhibiting a violation of
hyperscaling. This violation is measured by the critical exponent $\theta=1$
while the dynamical critical exponent is $z=2$. At zero temperature we compute
the thermodynamic potentials, the speed of normal sound, and the speed of zero
sound for both these massive D3/D(2n+1)-brane systems near their
non-relativistic fixed points. Moreover, we determine the first correction to
the free energy for small temperatures yielding the critical exponents $\alpha$
and $\nu$.
