Fifth

Date: 2026-02-11 Version: 0.1 alpha Status: Alpha version available

Fifth is a modern ColorFORTH compiler that emits SPARK, enabling compilation to bare metal via GNAT. Chuck Moore's minimalist language, running on any platform, with optional verification.

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Target Platforms

Via GNAT:

• x86-64 Linux, Windows
• ARM64 Linux, macOS
• Bare metal ARM
• RISC-V

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• Website: https://fifthlang.org/
• GitHub: https://github.com/LingenicLLC/fifthlang