  The last five years have seen growing challenges to the traditional paradigm
of a core collapse supernova powered by the neutrino emission of a young
proto-neutron star. Chief among these challenges are gamma-ray bursts (GRBs)
and the supernovae that seem to accompany them. Here we review some recent -
and not so recent - models for GRBs and supernovae in which strong magnetic
fields, rotation, or accretion into a black hole play a role. The conditions
for these energetic explosions are special and, at this point, there is no
compelling reason to invoke them in the general case. That is, 99% of
supernovae may still operate in the traditional fashion.
