There are quite a few libraries for charts and visualization, there are not as many for actually combining many of them with layouts, different components and including the actual implementation of the backend. Dac aims to provide all that as a standard and an implementation.
[0] https://vega.github.io/vega-lite/
Yours sincerely, came here for another DAC
Some that come to mind that are potentially tangentially related/similar:
https://github.com/evidence-dev/evidence