A simple programming language for 6502 based machines with Forth-like syntax
SPL-6502 is a Forth-style concatenative stack language. The compiler is (currently) written in Python and emits 6502 assembly code.
Originally created by Ron Kneusel for the Apple II (original source https://home.comcast.net/~oneelkruns/), adapted for the Atari 8bit and enhanced by Carsten Strotmann (cas@strotmann.de).
SPL is still work-in-progress, it has many "rough-edges" and might fail in certain places. It has many bugs. However, it works fine for some developers.