TeXCAD is a program for drawing or retouching {picture}s in LaTeX. It extends the original {picture} capabilities, even without any obligatory LaTeX package, class or style sheet. Core of TeXCAD is totally portable. A MS Windows version is available.
More information on... https://texcad.sourceforge.io/
Alire crate: https://alire.ada.dev/crates/texcad
Mirror: https://github.com/zertovitch/texcad
Ada projects - for educational purposes. Each is a small project illustrating a particular tool, technique. Ada is the primary language but will touch upon Qt, Networking, Image processing and so on.