This package defines a few simple TikZ charts that can be drawn using LaTeX environments.

See examples in the included documentation.

This package has been developed mainly to typeset a fancy résumé, but perhaps it could be used in other contexts too. I didn't want to write TikZ charts directly in the document as it would have turned a simple typesetting file into an unreadable document, and I would have forgotten every detail after just a few months.

I wouldn't have the patience to develop this with LaTeX or TeX either, but I was curious enough about expl3 to try an implementation. You should probably take this package as a rough tutorial on how to develop with expl3 because it uses nearly all the types defined in the reference documentation (expansion control, seq, prop, keys, int, bool, fp, dim, msg, ...) in straightforward ways.

TeX will always be that dusty tech you can't ignore because there are so many (unmatched) packages coming from academic circles. expl3 gives a touch of modernity and facilitates a lot package development by allowing to easily bridge LaTeX packages together (here LaTeX and TikZ).

It is not yet published on CTAN, but you can clone the repository and do a l3build install.

git clone https://github.com/eburghar/l3charts
cd l3charts
l3build install