Jupyter can do a lot, if not the same as Quiver. Jupyter is free, multiplatform, and supports 40 programming languages. I also use Emacs Orgmode, which is very

Jupyter can do a lot, if not the same as Quiver. Jupyter is free, multiplatform, and supports 40 programming languages. I also use Emacs Orgmode, which is very powerful, but I like the look of Jupyter notebooks.