Powerful and easy-to-use embedded GUI library with many widgets
Free and open source voxel art tools - editor, thumbnailer and format
Simple GTK# Paint Program
A modern library for 3D data processing
The open source mesh processing system
3D engine with modern graphics
Universal Scene Description
Lightweight, high-performance HTML renderer for game developers
3D GPUs Strange Attractors and Hypercomplex Fractals explorer
3D Engine c++
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Qt Visual Graph Editor
Software Facil, Vida Facil
Bloat-free Immediate Mode Graphical User interface for JVM
Live shader coding tool and Shader Showdown workhorse
Viewer and exporter for Unreal Engine 1-4 assets
Vivid is a modern C++ 3D engine using OpenGL4+
Compiler-like generic data scraper and GUI automation tool.
A shader-based software renderer written from scratch in C89