  We present results on the nucleon scalar, axial and tensor charges, as well
as, on the first moments of the unpolarized, polarized and transversity parton
distributions using $N_f=2$ and $N_f=2+1+1$ twisted mass fermions. These
include an ensemble that yields the physical value of the ratio of the nucleon
to the pion mass. Results on the axial charges of hyperons and charmed baryons
are also presented for a range of pion masses including the physical one.
