C99

cmpcamgunz/cmp

A lightweight, portable C implementation of the MessagePack serialization format (spec v5).

Asteratek256/astera

A C99 cross-platform 2D game library with deferred/forward rendering, collision detection, audio, and asset management.

buddy_allocspaskalev/buddy_alloc

A single-header buddy memory allocator for C and C++ with bounded performance and predictable metadata overhead.

LibXtractjamiebullock/LibXtract

A portable C library for efficient audio feature extraction with a cascading design for performance and flexibility.

cONNXralrevuelta/cONNXr

A pure C99 ONNX runtime with zero dependencies, designed for embedded devices and old hardware.

PlutoFiltersammycage/plutofilter

A single-header, zero-allocation C library for applying fast, chainable image filters compatible with SVG and CSS semantics.

Chocolate QuakeHenrique194/chocolate-quake

A minimalist Quake source port that accurately reproduces the original v1.09 DOS experience with no modern enhancements.

emlearn-micropythonemlearn/emlearn-micropython

Machine Learning and Digital Signal Processing library for MicroPython, enabling TinyML on microcontrollers without C code.

socket99silentbicycle/socket99

A C99 wrapper library that simplifies the BSD sockets API with a cleaner, configuration-driven interface.

actually-doom.nvimseandewar/actually-doom.nvim

Play the classic DOOM game directly inside Neovim v0.11+ on Linux and macOS.

RSC-C2003scape/rsc-c

A portable, enhanced RuneScape Classic client written in C99 with support for multiple platforms and modern features.