ColorForth

colorForth is a programming language created in the 1990s by Charles H. Moore, the original designer of Forth, as a successor built on his earlier Forth systems. Its central idea is using color, assigned to words as they are typed, to show how each word should be interpreted, for example as a command to execute immediately, a number, or a word to compile, which moves part of the work traditionally done by a compiler into the editor itself; the source is tokenized as it is entered rather than parsed afterward as plain text. Like other Forth dialects, colorForth is typeless and combines procedural and stack-oriented programming, where operations act on a shared data stack instead of named variables. It is released into the public domain.