Extragalactic novae have been discovered in more than a dozen galaxies including, Andromeda galaxy, LMC, M32, M33, M87, M81, M100, SMC, and Coma Cluster.
Andromeda Galaxy (M31)
As of March 2015, 1989 novae have been discovered in the Andromeda galaxy.
M33 is a nearby bulgeless galaxy with a nova rate of about 2/yr.
Large Magellanic Cloud
LMC is a late-type low mass galaxy with a nova rate of one every 1.8 years on average.
*For details on extragalactic novae see following website: rochesterastronomy.org/novae.html