  We discuss type IIB orientifolds with D-branes, and NSNS and RR field
strength fluxes, with D-brane sectors leading to open string spectra with
non-abelian gauge symmetry and charged chiral fermions. The closed string field
strengths generate a scalar potential stabilizing most moduli. Hence the models
combine the advantages of leading to phenomenologically interesting (and even
semirealistic) chiral open string spectra, and of stabilizing the dilaton and
most geometric moduli. We describe the explicit construction of two classes of
non-supersymmetric models on $\IT^6$ and orbifolds/orientifolds thereof, with
chiral gauge sector arising from configurations of D3-branes at singularities,
and from D9-branes with non-trivial world-volume magnetic fields. The latter
examples yield the chiral spectrum of just the Standard Model.
