CPU-Z80-Assembler implements Z80 assembler and macro systems. It
compiles assembler files into object files.
naken430asm provides a development kit for the Texas Instruments MSP430 line of microcontrollers. It currently includes a cross-platform command-line assembler, disassembler, and simulator with no external dependencies.
MandelQt produces many different Mandelbrot and other iterative functions graphically. It can zoom in and out, save and print images, animate colors, and more.
A portable source code librarian.
A system-independent interface for user-level packet capture.