Banjo is a lightweight, self-contained C99 framework based on four principles:
Simple – if you know C, you can use it.
Minimal – no external dependencies, even for tests.
Self-documented – APIs are explained in the headers.
Fast – must compile quickly.

Features include windowing and events, bitmap manipulation (loading, blitting, primitives), logging, custom allocators, and math utilities (vec2, vec3, vec4, mat3, mat4, quat). A roadmap is available at Development Status.

The build system is CMake, though the code can also be compiled without it. Instructions are at Building the API.

Banjo is tested on the following environments, where “tested” means the full project builds and all tests run successfully:

Demo code and usage examples are provided at Examples.