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PLplot is a cross-platform, scientific graphics plotting library that supports math symbols and human languages (via UTF-8 user input strings); plot capabilities for multiple non-interactive plot file formats and in multiple interactive environments; and bindings for multiple computer languages.
GLOBE_3D: GL Object Based Engine for 3D. GLOBE_3D is a free, open-source, real-time 3D Engine written in Ada, based on OpenGL. Up-to-date GL bindings - portal rendering - binary space partition - object I/O - tools for importing - and more...
More information on... http://globe3d.sf.net
Alire crate: https://alire.ada.dev/crates/globe_3d
Mirror: https://github.com/zertovitch/globe-3d/
3D slider puzzles for kids; helps teach solid geometry
...They can help improve 3D visualization and problem solving skills. Suitable for children preparing for math or geometry, as well as adults. Works on laptops or PCs or Macs running Windows, OSX, or Linux.