Geometric Tools Engine 3.25. The distribution was posted on April 29, 2019. The following operating systems and compilers are supported, and testing was performed on all systems. If you use OpenGL, GTEngine requires OpenGL 4.3 (or later) and GLSL 4.3 (or later) in order to support compute shaders and GLSL introspection.

GTEngine 3.25 License Agreement (Boost)
GTEngine 3.25 Installation and Release Notes (PDF)
GTEngine 3.25 Distribution (ZIP)
GTEngine Update History (PDF)
Zip File hash codes (MD5, SHA256)

Wild Magic Engine 5.17. Until we have finished porting the Wild Magic source code and applications to the Geometric Tools Engine, the old distribution is still available for download. Wild Magic is supported on Microsoft Windows 7 or later (Microsoft Windows 7, 8.0, 8.1, 10; Microsoft Visual Studio 2010, 2012, 2013, 2015, 2017; OpenGL [WGL]; DirectX SDK June 2010), Linux (various flavors; OpenGL [GLX]; g++ 4.x), and Macintosh OS X 10.11.1 [El Capitan] (OpenGL [GLUT]; Xcode 7.1.1 with Apple LLVM Compiler Version 7.0.0). The posting of this version is May 27, 2017.

Wild Magic 5.17 License Agreement (Boost)
Wild Magic 5.17 Installation and Release Notes (PDF)
Wild Magic 5.17 Distribution (ZIP)
Wild Magic 5 Update History (PDF)
Zip File hash codes (MD5, SHA256)

For those of you who prefer a language other than C++, visit the following links.

Also, I have added a sample application GTEngine/Samples/CSharpCppManaged that shows how to wrap some GTEngine code using a managed wrapper (C++/CLI) and call it in a C# application.