This review talk explores the diverse outcomes of white dwarf mergers, emphasising that not all double degenerate mergers result in supernovae. Possible outcomes include the formation of a more massive WD, partial explosions that leave behind unusual remnants, and merger-induced collapse leading to the formation of rapidly spinning neutron stars or magnetars. Additionally, merging WDs have been proposed as potential progenitors for long $\gamma$-ray bursts and Fast Radio Bursts.