Flat
Flat comes from a context of art/architecture/generative design, written in python, good color support (rgb/cmyk/grayscale/overprint), supports flexible text flows, examples in documentation, comes with a second tool to make it easier to use called even, one developer, but has a monoskop page, and there is an email address on the web page, last commit 4 years ago..., no dependencies though!
- examples: https://github.com/xxyxyz/flat-examples
- monoskop page: https://monoskop.org/Juraj_Sukop
- video of presentation: https://www.youtube.com/watch?v=9EOOErc1vUQ
- Allison Parish also contributed to Flat
- sister project "even": https://xxyxyz.org/even/