scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Simple and light-weight 3D game engine
Game engine supporting many 3D/2D formats and graphic effects
LDraw™ editor for LEGO® style digital building instructions.
crossplatform multithreaded object-oriented render and audio engine
Vivid3D is an open-source 3D engine with powerful 2D UI.
High performance C++ library for building Wayland compositors
C# graphics library used for 3D modeling, built with OpenGL/OpenTK
Go 3D Game Engine
A modern yet simple multi-platform video cutter and joiner
Vivid is a modern C++ 3D engine using OpenGL4+
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Modern 3D engine and IDE written using C# and C++.
an osm openstreetmap 3D / bing maps car / flight / ballon sim game
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
A Landsat 8 scene viewer
3D .NET engine for Windows, Linux, Mac
A game engine written in the D programming language
Mahasona engine is an open source game engine.