  At zero temperature, two-dimensional Ising spin glasses are known to fall
into several universality classes. Here we consider the scaling at low but
non-zero temperature and provide numerical evidence that $\eta \approx 0$ and
$\nu \approx 3.5$ in all cases, suggesting a unique universality class. This
algebraic (as opposed to exponential) scaling holds in particular for the $\pm
J$ model, with or without dilutions and for the plaquette diluted model. Such a
picture, associated with an exceptional behavior at T=0, is consistent with a
real space renormalization group approach. We also explain how the scaling of
the specific heat is compatible with the hyperscaling prediction.
