There is a number of basis sets that can be free downloaded from this site.

There are basis sets optimized for the use include non relativistic and include Douglas-Kroll-Hess (DKH) calculations.

Basis Set Type:
Basis Set Type:

Format:

Gamess
Gaussian
Dalton
Hyperchem
Nwchem
Molcas
Molpro
Turbomole