GCBASIC is an open-source BASIC compiler for 8 bit Microchip PIC, Atmel AVR legacy, AVRDx and LGT microcontrollers.
See https://ko-fi.com/post/The-Story-of-GCBASIC-Making-Microcontroller-Progr-D1D319SJ72 for story of GCBASIC.
This is a continuous release project. The latest release is always available. This will give you the most complete development toolchain to create and program 8-bit PIC, AVR and LGT microcontrollers.
We have added new capabilities that make GCBASIC the...
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.