The M68k was, and still is, a popular family of CISC microprocessors introduced in 1979 by Motorola. Early on, it found its way into advanced workstations, Macintoshes, homecomputers and embedded systems.
More details can be found here.
Computers in my collection based on M68k are:
68000/68010
Atari and Commodore systems will appear later.
68020
Apple systems will appear later.
68030
Apple Macintosh IIsi
Apple Macintosh SE/30