A simple and not very good software renderer

Pseudo-3D raycasting engine in C++17

A ray-tracing 3d renderer in C/C++ and SDL.

Corium 3D Game Engine

A 3D software renderer with a simple API.

The open-source 3dfx Glide API for 3D rendering on 3dfx video cards. Ported to CMake to work with modern compilers. Even has CI builds for Windows and Linux.

Git mirror of openglide CVS (http://openglide.sourceforge.net/)

MS DOS 3D Wireframe Cube with Fixed Point Maths

VGA software renderer (mode 13h / mode X) written in C and x86 asm

Software renderer for DOS (mode 13h)

A neat, portable, realtime 3D rendering library.

Retro game engine for creating games like it's 1997

An extension of Fabrice Bellard's TinyGL project