A game framework written with osu! in mind.
Molecular viewer and prototyping framework
Vivid3D is an open-source 3D engine with powerful 2D UI.
Modern 3D engine and IDE written using C# and C++.
Reactive extensions for Unity
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
A 2D tile map editor created using .NET framework.
Investigo - DX9 Performance and Debugging Toolkit
DREAM is an Open Source GCS