SlimEngine is now complete! https://github.com/HardCoreCodin/SlimEngine (no plans to add anything, as I wanna keep it slim/minimalist)

For clarity, here's a summary:

• Plain C: Compilable in either C or C++
• Platform-agnostic and very slim (barebone executable is ~17Kb).
• Self-contained: No dependencies (except for math.h).
• Single-header or a header-directory ("unity build").
• Rich README with heavilly documented examples.

Features:

• 3D viewport with wireframe rendering, rich navigation and a flexible HUD.
• Scene with cameras, meshes and parametric 3D shapes.
• Scene selection with rich interactive manipulation.
• Mesh: Loading from files, instancing and wire-frame drawing.
• Semi-automatic memory allocation for scene content.
• Scene and viewport are fully customizable via callbacks.

Based on SlimApp (a base-project for windowe'd apps) featuring:

• A well-behaved window (resizable, minimizable, etc.).
• Canvas for drawing numbers, text and basic shapes.
• Mouse and keyboard input capturing and handling.
• File reading and writing.
• Memory arena allocation.