Simple C compiler
C compiler and dev kit for the z80 with assembly language libraries.
ATasm is a 6502 command-line cross-assembler.
K&R C compiler for the 68000
BCPL was designed by Martin Richards at Cambridge University (1966)
Tiny education compiler that can compile itself
C portable ARM aeabi
Assembler language for modern times
COBOL compiler for the PC x86-32 platform.