Game Editor is the game design software that gives you the power to create the games of your dreams, and gives you the chance to get the source code of the game creator and develop 2D games for personal computers as well as mobile devices like iPhone
ZASM is a 2 pass assembler for Zilog's 8-bit CPU Z80.
Supported platforms: Unix-style OS, e.g. MacOS X, Linux, BSD.
Special support for ZX Spectrum emulator file formats.
Binary or intel hex file output.