Geometric Algebra using wxMaxima (GAwxM).
The project includes many examples and multivector functions
coded in robust, validated, well documented software.
GitHub repository for GAwxM
wxMaxima is a freely available Computer Algebra System.
The sonnets of Shakespeare may also be browsed.
The coloured web pages form a tesseract of spaces,
and it can be relaxing just to move from space to space.
One of the sonnets is presented whenever a colour is chosen.