pyz80 is a z80 cross-assembler written entirely in Python. It accepts text files with the syntax of the Sam Coupe's popular COMET assembler, and outputs a disk image suitable for loading in SimCoupe or transferring to floppy disk for use with a real Sam.12 weekly downloads
SPL is a cross-compiler for a simple language. It produces plain 6502 assembly code which is then assembled to binary or specialized formats for the Apple II including 140k disk images for emulators. "SPL" = "Simple Programming Language"