The C3 programming language (C alternative language)
Get it from here: https://github.com/c3lang/c3c In 2019, while contributing to the C2 language, I started up "C3" as a pet project while waiting for pull requests to be approved... Now it's 6 years later and C3 well on its way to 1.0, having released 0.7.0 last week. Unlike other C alternatives, C3 tries to evolve C – but without concern to backwards compatibility to the latter. What it adds to C is among other things: - Module system - Semantic macros and compile time introspection - Lightweight generic modules - Zero overhead errors - Build-in slices and SIMD types -…
In plain words
C3 is a programming language that evolves C without maintaining backward compatibility. It adds a module system, semantic macros, compile-time introspection, lightweight generics, zero-overhead error handling, built-in slices and SIMD types, gradual contracts, and debug-mode checks. Designed for developers seeking a modernized C alternative, C3 is approaching version 1.0 and available on GitHub.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Get it from here: https://github.com/c3lang/c3c In 2019, while contributing to the C2 language, I started up "C3" as a pet project while waiting for pull requests to be approved... Now it's 6 years later and C3 well on its way to 1.0, having released 0.7.0 last week. Unlike other C alternatives, C3 tries to evolve C – but without concern to backwards compatibility to the latter. What it adds to C is among other things: - Module system - Semantic macros and compile time introspection - Lightweight generic modules - Zero overhead errors - Build-in slices and SIMD types - Gradual contracts - Built-in checks in debug mode You can find more details on the site: https://c3-lang.org It might be interesting to look at the examples: https://c3-lang.org/language-overview/examples/ so see how the language looks for some simple examples. Some other links that might be interesting follows: I've posted about C3 on HN before, notably - https://news.ycombinator.com/item?id=24108980 - https://news.ycombinator.com/item?id=27876570 - https://news.ycombinator.com/item?id=32005678 Here are some interviews on C3: - https://www.youtube.com/watch?v=UC8VDRJqXfc - https://www.youtube.com/watch?v=9rS8MVZH-vA Here is a series doing various tasks in C3: - https://ebn.codeberg.page/programming/c3/c3-file-io/ Some projects: - Gameboy emulator https://github.com/OdnetninI/Gameboy-Emulator/ - RISCV Bare metal Hello World: https://www.youtube.com/watch?v=0iAJxx6Ok4E - "Depths of Daemonheim" roguelike https://github.com/TechnicalFowl/7DRL-2025
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